JMNT(i)
16 So Jesus said, "At this point in time, do you folks, as well, continue being unable to let things flow together, and are you without comprehension?
17 "Are you not habitually using your minds and your intelligence to carefully think, that everything normally and habitually flowing into the mouth is progressively moving on into the stomach and then the intestines, and later is periodically discharged (or: thrust out) into a toilet or a sewer?
18 "Yet the things constantly emerging and flowing forth out of the mouth are continually coming forth from out of the midst of the heart (the core of the individual; the self as a whole, at its deepest level, which is the individual's animating and driving force [note: I owe these last phrases to Marcus Borg, The Heart of Christianity]) – and those things continually make the person contaminated, defiled, ceremonially unclean and common.