Matthew 12:33-35

“A tree is identified by its fruit. If a tree is good, its fruit will be good. If a tree is bad, its fruit will be bad. You brood of snakes! How could evil men like you speak what is good and right? For whatever is in your heart determines what you say. A good person produces good things from the treasury of a good heart, and an evil person produces evil things from the treasury of an evil heart.