7:15 There is nothing entering into a man from without which can defile him - Though it is very true, a man may bring guilt, which is moral defilement, upon himself by eating what hurts his health, or by excess either in meat or drink yet even here the pollution arises from the wickedness of the heart, and is just proportionable to it. And this is all that our Lord asserts.
7:14-23 Our wicked thoughts and affections, words and actions, defile us, and these only. As a corrupt fountain sends forth corrupt streams, so does a corrupt heart send forth corrupt reasonings, corrupt appetites and passions, and all the wicked words and actions that come from them. A spiritual understanding of the law of God, and a sense of the evil of sin, will cause a man to seek for the grace of the Holy Spirit, to keep down the evil thoughts and affections that work within.
