{Out of the mouth} (ek tou stomatos). Spoken words come
out of the heart and so are a true index of character. By "heart"
(kardias) Jesus means not just the emotional nature, but the
entire man, the inward life of "evil thoughts" (dialogismoi
pon(8872)oi) that issue in words and deeds. "These defile the man,"
not "eating with unwashed hands." The captious quibblings of the
Pharisees, for instance, had come out of evil hearts.