Cross-referencesExplore similar Bible verses on Proverbs 15:7 in English Standard Version "The lips of the wise spread knowledge; not so the hearts of fools." Mt 12:34 You brood of vipers! How can you speak good, when you are evil? For out of the abundance of the heart the mouth speaks.Mt 12:35 The good person out of his good treasure brings forth good, and the evil person out of his evil treasure brings forth evil.