A good man out of the good treasure of the heart brings forth good things: and an evil man out of the evil treasure brings forth evil things.
All Commentaries on Matthew 12:35 Go To Matthew 12
John Chrysostom
AD 407
When wickedness is overflowing within, its words will pour out of one’s mouth. So when you hear someone speaking wicked words, do not suppose only so much wickedness to be in that one as the words display, but suspect the fountain to be much more abundant. For that which is spoken outwardly is the superabundance of that which is within. The Gospel of Matthew, Homily