The sense in which the "new commandment" of Jn.13 is "new" is not completely
clear. "You shall love your neighbor as yourself" (Lev.19:18) is of course part of the
Mosaic legislation & in the synoptics Jesus cites it as being second in importance only
to the command to love God. Thus the "new commandment" is an intensification of the
old.
I would agree with the rabbi that what Jesus said of a legal nature is already
in the OT. That is not the case, however, for what he says - and what we can infer -
about his relationship with God as his Father & about his claim to have authority to
forgive sins.
Shalom,
George
George L. Murphy
gmurphy@raex.com
http://web.raex.com/~gmurphy/