Science in Christian Perspective
The Levitical Dietary Laws in the Light of Modern Science
THOMAS D. S. KEY
Biology Department
Oglethorpe University Atlanta, Georgia 30319
ROBERT M. ALLEN
Science Department
Babb Junior High School Forest Park, Georgia 30054
From: JASA 26 (June 1974): 61-64.
Leviticus 11 presents dietary laws, specifying which animals are
"clean"
(edible) and "unclean" (inedible). Nine ma/or theories to account for
these dietary laws are described in this paper, giving arguments pro
and con regarding
each. The theories discussed are the Obedience Testing, Arbitrary
Divine Command,
Assertion of Divine Authority, Moral Discipline, Hygiene, Spiritual Symbolism,
Pagan Worship, Religious Badge, and Eclectic theories.
The authors conclude that more evidence is needed, especially from archaeology,
to come to a definite conclusion regarding the validity of any of
these theories.
They feel that if the original purpose of these dietary laws can be determined,
then perhaps we can make modern applications of lessons from them.
Introduction
One of the most obvious characteristics of orthodox conservative Jews as well
as of Moslems and of the Christian groups who emphasize the Old
Testament is the
influence of the Levitical dietary laws on their eating habits. Yet, when one
questions those who adhere to these dietary laws about the reasons for them, he
receives a variety of answers.
Leviticus 11 describes "clean" animals (i.e., those which
may be eaten)
as follows: any animals that "part the hoof, are cloven-footed, and that
chew the cud." Also, all aquatic animals that have fins and
scales, and winged
insects that leap (i.e., locusts, crickets, and grasshoppers) are
"clean"
or permitted for food.
"Unclean" animals (i.e., those that are forbidden for food)
were listed
as follows: camel, rock badger, hare, swine, aquatic animals lacking fins and
scales, eagle, ossifrages, osprey, kite, falcon, raven, ostrich, nighthawk, sea
gull, hawk, owl, cormorant, ibis, water hen, pelican, vulture, stork,
heron, crawling
insects, hoopoe, weasel, mouse, great lizard, gecko, land crocodile,
bat, lizard,
sand lizard, and chameleon.
While the Bible nowhere states specifically why
the dietary laws were given, several theories have arisen to account for them.
Below are brief descriptions of nine' of these theories, along with
some arguments
for and against their acceptance.
Obedience Testing Theory
This view asserts that the choice of animals was arbitrary, but that
God's purpose
was to evaluate the spirituality of the faithful. The obedience testing theory
also considers the Tree of Knowledge of Good and Evil (Genesis 2) to have been
arbitrarily selected, and that it was the act of disobedience that imparted the
knowledge of good and evil rather than any physiological effect of
the chemicals
present in the fruit.
Pro: The Scriptures indicate in several places where the faith of
people was tested
(Job, I Kings 19, Genesis 2 and 3, etc.).
Con: The choice of animals does not appear to be arbitrary as the
animals classified
are consistent in certain ways as discussed below.
Arbitrary Divine Command Theory
It seems strange to some that most strict adherents of the Levitical
dietary laws
accept this theory, thought. They may not refer to it by this name. According to this theory, the
animals were
arbitrarily classified by God as clean or unclean with no specific
reason whatever.
We are told that to raise questions about the reasons or advantages
of these laws
is to evade the issue. We are to accept these laws by blind faith. The point is
that God commanded, and we are to obey. "God said it. I believe
it. And that
settles it. Period."
Pro: If God had reasons for the laws, or if it were important for us to know of
them, they would have been recorded. But such is not the case. The fact that no
reasons are given is evidence that they are unnecessary for us.
Con: It seems inconsistent with a loving, just, omniscient God to be arbitrary,
or to command just for the sake of commanding. The fact that the animals hold
certain traits in common (shown in some of the following theories) would tend
to rule out the concept that they were haphazardly or arbitrarily chosen.
Assertion of Divine Authority Theory
The purpose of these laws was to establish God's authority, and to serve as a
continual reminder of His authority over and concern for His people, according
to this theory. These laws are beneficial in that they tend to
establish a habit
of thinking frequently about God and His place in our lives.
Pro: The concept of God's establishing His authority and reminding others of it
is certainly consistent with many Scripture passages, for example,
the requiring
of phylacteries, and redeeming each first-horn donkey with a lamb
(Exodus 13:13-14);
the Sabbath (Exodus 20:811); the rainbow (Genesis 9:11-17); stars
(Genesis 1:14);
the mark on Cain (Genesis 4:15); Miriam's leprosy (Numbers 12:10); circumcision
(Genesis 17:11); and labor pangs, toil and thorns (Genesis 3:17-19). The fact
that no reasons are given means none are needed. Reasons would weaken
His authority.
Con: The selection of animals would seem to indicate that there was more to it
than this (as indicated in certain of the following theories). It
would seem arbitrary
and superficial for God to assert His authority in such an
unproductive fashion.
Would it not be more profitable for God's kingdom and the spiritual welfare of
countless people if God required His people to seek to win others to His ways?
If God's purpose for these laws is simply to assert His authority, why would He
not make useful laws, such as requiring the faithful to he neighborly?
Moral Discipline Theory
According to this concept, the laws were to teach moral discipline, much as it
was once believed that mathematics and Latin should he taught to discipline the
intellect. For similar reasons some military academies have required
certain patterns
of eating (i.e., special ways of holding silverware, of sitting erect
while eating,
etc.) in order to remind cadets constantly of their discipline.
Pro: The Bible is consistent with moral disciplinary techniques. The fact that
the price of a whore and of a dog (Sodomite) were unclean tends to
favor the moral
interpretation of these laws. In numerous passages the Hebrews were
reminded that
they "came up out of the land of Egypt." (Dent. 23:4). These dietary
laws would serve as similar daily reminders of their moral discipline. Nazarites were to remain unshaved and to abstain from alcohol
for disciplinary reasons (Numbers 6:2-20). Paul beat his body into subjection
(I Cor. 9:27). "The rod" is to be used for discipline in
certain circumstances
(Proverbs 10:13; 22:15; and 26:3).
Con: As with the preceding theories, the particular animals selected
to be clean
or unclean appear to have enough in common to warrant other explanations than
this. To limit what foods may be eaten merely for reasons of moral discipline,
and to allow no exceptions, could result in malnutrition, death, or forcing an
immoral beaking of the laws in the event of famine, poverty, or other
problems.
Hygiene Theory
The adherents of this theory point out that there is close correlation between
clean animals and those that are less likely to transmit zoonoses
(diseases spread
from animals to man), and between unclean animals and those that are
most likely
to transmit worms, bacteria, and other pathogens to man,
Pro: Hogs are particularly likely to spread disease, e.g.,
trichinosis and Ascaris.
Buzzards can transmit many of the diseases that kill the animals on which they
feed. Rat meat could give those who eat it trichinosis and other diseases.
On the other hand, while cattle can give us tuberculosis, tapeworms, undulant
fever, for example, they are much less likely to give us more serious diseases.
Essentially the same can be said for sheep.
Any fish that "looks like a fish" is considered clean, while oysters,
clams, and other sea creatures are unclean. It is noteworthy here
that true fish
as a rule are less likely to be carriers of zoonoses than are other
aquatic animals.
Not only does the hygiene theory account for the particular selection of clean
and unclean animals, but also accounts for the listing of other
unhygienic things
as unclean. For example, human wastes were unclean (Dent. 23:12-14), as well as
cooking utensils and other solid objects which were contaminated by people with
running sores (Leviticus 13:47 and 14:34-55).
Paul wrote to Timothy that he should not drink water, but should drink wine (I
Timothy 5:23). Paul's reason obviously favors the hygiene theory, as water was
often polluted by human wastes, carcasses and other bacteria sources.
Con: A much more sensible and practical regulation would be to specify that all
animals in sanitary environments are clean, while those that are
raised in unsanitary
environments are unclean. Or, better still, properly cooked meat is
clean, while
raw or rare meat is unclean, regardless of the animal from which it comes. If
this were the regulation, not only could beef, mutton, and true fishes be eaten
without fear of zoonoscs, but the same would be true even of pork and
other animals
listed as unclean. This theory also faces the difficulty that unclean animals
were let down from heaven to Peter (Acts 10:9-29 and 11:5-12), and God responded
to Peter's refusal to eat with, "What God has cleansed, you must not call
unclean." The fact that menstruating women and women who had
just given birth
were considered unclean (Leviticus 12), showed that the designation of unclean
does not necessarily imply a potential source of contagion or
infection. The fact
that the price of a whore or of a dog (or Sodomite) was unclean shows the same. Although there are numerous poisonous plants,
none is listed
as unclean. And although water could he polluted by carcasses, human
wastes, and
other contaminants, nothing is discussed regarding clean or unclean water. Even
in those days water was a main source of the spreading of disease.
Paul's advice
to Timothy not to drink water was of course written many centuries
after the dietary
laws of Leviticus, and under the circumstances of Timothy going on missionary
journeys in which water could be polluted.
Some object to the Hygiene Theory on the grounds that little was then
known about
hygiene, while others insist that these hygiene laws prove divine inspiration.
(See also Matthew 15:11).
Spiritual Symbolism Theory
It is pointed out by those who favor this theory that the clean animals have in
common the fact that they all symbolize spiritual virtues, while the
unclean animals
symbolize spiritual vices.
Pro: It should be emphasized that the Bible is an Oriental book, and
that Orientals
have long been noted for symbolic and figurative speech. The Bible uses several
symbols for Christ: e.g., lamb (John 1:35), lion (Revelation 5:5),
root (Revelation
5:5), and grapevine (John 15:1). The Holy Spirit is symbolized by the
dove (Luke
3), fire (Hebrews 12), and water (Acts 11:16). God, Satan, Israel, the church,
the rebellious wicked, the Gospel, sin, and other persons and
concepts are represented
by still other symbols, and many of the symbols were animals. Cattle and oxen
are clean animals because they represent honest hard work and
obedience to duty.
Donkeys are unclean as they symbolize stubbornness, spiritual
stupidity, and selfishness.
Snakes are unclean because they depict Satan and sin (Genesis 3:1-15). Hogs are
unclean because they are greedy and look down. The horse is unclean
as it symbolizes
pride and human military conquest.
Con: While the Spiritual Symbolism Theory is intriguing, it has some
fatal inconsistencies.
The lion is unclean, yet it is used to represent Christ (Revelation
5:5) and the
righteous (Proverbs 28:1). The pearl represents the church (Matthew 13:46), yet
is produced by unclean clams and oysters. The symbolism in the Bible
is not intended
to be consistent and clearcut as this theory would assume. Thus,
while doves illustrate
the Holy Spirit (Luke 3:22), they also illustrate wicked Ephraim (Hosea 7: 11).
The donkey is an unclean animal, yet was chosen by Christ to ride for
His "triumphal
entry" into Jerusalem (Matthew 21). The serpent was a symbol of Satan, but
was also used for salvation (Numbers 21:9). Grapes are clean, but their juice
was warned against when it is fermented (Ephesians 5:8 and I Timothy 3:3), and
was forbidden to Nazarites under most circumstances (Numbers 6:3-20). The eagle
is unclean, yet is used to symbolize God's power (Revelation 4:7). The lion
is used to symbolize Christ (Revelation 5:5), Satan
(I Peter 5:8), the righteous (Proverbs 28:1), and the rebellious wicked (Joel
1:6).
Pagan Worship Theory
It is noteworthy that the Hebrews spent centuries living among
neighbors who worshipped
animal-like gods. Part of the worship rites of these religions some
While the Bible nowhere states specifically why the dietary laws were given, several theories have arisen to account for them. Given here are brief descriptions of nine of these theories, with arguments for and against their acceptance.
times included the eating of these animals. Thus, the sacred animals of these
pagan religions were unclean, while animals not sacred to these religions were
clean.
Pro: The eagle was sacred to the Egyptians. The snake, hawk, hog,
goat, and horse
were sacred to other neighboring religions. Sheep, camels, true fish, and most
plants were not sacred to the nations and tribes around the Hebrews, and hence
were clean. The faithful were to avoid all appearance of evil (I Thessalonians
5:22). They were forbidden to eat food sacrificed to idols
(Revelation 2:14, 20).
It is interesting that even today Arabs consider eating with someone
to be a close
form of fellowship.
Con: Several plants were sacred to the pagan religions, but were not
unclean (II
Kings 23:4). Cattle were sacred to several groups (II Kings 17:16),
yet were clean.
There have long been fish gods 'tnd sea gods, yet true fish were
clean. In fact,
fish deities are more common than clam, oyster, or shrimp deities, yet the fish
were clean while the latter were not.
Religious Badge or Mark Theory
Many peoples have done or worn certain things to distinguish
themselves from others.
The uniforms of certain occupations are partly for this purpose, as
are some greetings,
gestures, hairdos, and customs, The Jews were God's earthly chosen
people (Deuteronomy
7:6), chosen to witness for Him.
Pro: The Jews were required to do several things as religious marks or badges
to make them stand apart as witnesses for God: circumcise their boy
babies (Genesis
17:10-27), rest on the Sabbath (Exodus 20:8-11), wear phylacteries on
their foreheads
(Exodus 13:16) and the like. The dietary laws were a logical extension of these
religious badges. The Bible describes several other marks or badges
of spiritual
significance. Paul was blinded on the road to Damascus to get Paul's attention
and to show God's mark of approval of Christ (Acts 9:3-9). Zechariah was struck
speechless for several days as a mark of God's relationship to Christ's birth
(Luke 1:1823). Moses' sister, Miriam, was marked with a whitish skin disease to
show God's disapproval of her objecting to Moses' dark skinned
African wife (Numbers
12:1-15). God put a mark on Cain's forehead as a warning that no one
was to seek
revenge against him (Genesis 4:1315). The Nazarites wore long hair and beards
and ate a strict diet (Numbers 6:1-21).
Con: The selection of clean and unclean animals does not appear to he
haphazard,
but to fit certain patterns (as discussed in some of the foregoing theories).
To prohibit certain wholesome foods merely as religious badges could result in
malnutrition or death during famines. It could severely handicap the
poor or physically
disabled. It could result in financial exploitation and monopolies of the few clean species. It could result in
upsetting the
balance of nature due to extermination of some species and the
ignoring of others.
A more practical badge would appear to be some kind of ritual associated with
food preparation or eating.
Eclectic Theory
Some Bible students prefer to combine parts of two or more of the
above theories
to account for the reasons behind the dietary laws. Actually, there
are many variations
of the eclectic theory. They obviously differ on which of the above
explanations
are regarded as valid, and to what extent the accepted explanations
are considered
to account for each animal.
Pro: The fact that the Bible does not indicate any one reason might be due to
the fact that several explanations are necessary. The fact that several of the
preceding theories appear to be partially valid, yet no one of them is capable
of accounting for each animal indicates that some eclectic
explanation is necessarily
the correct one.
Con: It is difficult to evaluate the eclectic theory as its variations are so
numerous. Yet, the con arguments for each of the preceding theories
are sufficient
to show that none is valid as understood at present. If all the links
in a chain
are weak, simply adding more links will not make it stronger. Adding more straw
to a straw house does not make it more fireproof. Likewise, simply
adding useless
theories together does not make a valid explanation.
Conclusions
In the light of the above the authors conclude that
present evidence is not sufficient to warrant total acceptance of any one of the nine theories. More evidence is needed, especially
from possible future archaeological discoveries. In the meantime, it
would appear
that, in the light of the different kinds of dietary and other
"hygiene"
laws given, that some eclectic interpretation is probably correct.
It should be noted that many Christians feel that it is no longer necessary to
obey the Levitical dietary laws as the Old Testament Law was our
"schoolmaster"
to bring us to Christ (Calatians 3:24-25). Their interest in them is primarily
historical. Yet if we are able to determine the original purpose of the laws,
perhaps we can make modern applications of lessons from them. For this reason
it is recommended that further study be made on this subject.
REFERENCES
1A tenth important theory was inadvertently omitted: the Social Mores Theory. It
argues that all societies have certain customs and taboos, and that the dietary
laws are no more than this.
American Public Health Association, The Control of Communicable Diseases
in Man. U.S. Public Health Service, 1950.
Cable, Raymond M. An Illustrated Laboratory Manual of Parasitalogy. Minneapolis: Burgess Publishing Ca., 1958.
Chandler, Ass C. Introduction to Parasitology, 9th Ed., New
York: John Wiley & Sons, lay., 1949.
Lapage, Geoffrey. Animals Parasitic in Man. Glasgow: Robert
MacLehase and Ca., Ltd., 1957.
Rosehury, Thendar. Life on Man, New York: The Viking Press,
1969.
Yearbook of Agriculture, The Animal Diseases. Washington:
The United States Department of Agriculture, 1956.
Yearbook of Agriculture, The Food. Washington: The United
States Department of Agriculture, 1959.