A good man out of the good treasure of his heart bringeth forth that which is good; and an evil man out of the evil treasure of his heart bringeth forth that which is evil: for of the abundance of the heart his mouth speaketh.

A kind person shares goodness from their heart, while a bad person shares badness. A person's heart shows what they say.

King James Version

Simple English

* Work in progress - there may be occasional inaccuracies