מִפְּרִ֣י פִי־אִ֭ישׁ יֹ֣אכַל ט֑וֹב וְנֶ֖פֶשׁ בֹּגְדִ֣ים חָמָֽס׃
A man shall eat good from the fruit of his mouth; But the desire of the faithless is violence.
Read Jewish philosophical commentary on Proverbs 13:2: and classical philosophical sources.