These are the things which defile a man: but to eat with unwashed hands defiles not a man.
All Commentaries on Matthew 15:20 Go To Matthew 15
Theophylact of Ochrid
AD 1107
The Saviour rebukes the disciples and censures their lack of sense, either because they took offense or because they did not understand the obvious. For He says, "That which is understood and is apparent to all, you do not understand; that food does not remain within but passes out below, not at all polluting a man’s soul, for it does not remain inside. But thoughts are engendered within and remain there, and when they come out, that is, proceed to deed and act, they pollute the man." For the thought of fornication stains while it remains within, but when it issues forth into deed and act, it utterly defiles.
