{Howbeit in all men there is not that knowledge} (all' ouk
en pasin h(8820)gn(9373)is). The knowledge (h(8820)gn(9373)is) of which Paul
is speaking. Knowledge has to overcome inheritance and
environment, prejudice, fear, and many other hindrances. {Being
used until now to the idol} (	(8869) sun(8874)hei(8369) he(9373) arti tou
eid(936c)ou). Old word sun(8874)heia from sun(8874)h(8873) (sun, (8874)hos),
accustomed to, like Latin _consuetudo_, intimacy. In N.T. only
here and  Joh 18:39  1Co 11:16 . It is the force of habit that
still grips them when they eat such meat. They eat it "as an idol
sacrifice" (h(9373) eid(936c)othuton), though they no longer believe in
idols. The idol-taint clings in their minds to this meat. {Being
weak} (asthen(8873) ousa). "It is defiled, not by the partaking of
polluted food, for food cannot pollute ( Mr 7:18f.  Lu 11:41 ),
but by the doing of something which the unenlightened conscience
does not allow" (Robertson and Plummer). For this great word
suneid(8873)is (conscientia, knowing together, conscience) see on
涉c 23:1|. It is important in Paul's Epistles, Peter's First
Epistle, and Hebrews. Even if unenlightened, one must act
according to his conscience, a sensitive gauge to one's spiritual
condition. Knowledge breaks down as a guide with the weak or
unenlightened conscience. For asthen(8873), weak (lack of strength)
see on 烘t 26:41|. {Defiled} (molunetai). Old word molun(935c), to
stain, pollute, rare in N.T. ( 1Ti 3:9  Re 3:4 ).