45 The good man out of the good treasure of his heart brings forth what is good; and the evil man out of the evil treasure brings forth what is evil; for his mouth speaks from that which fills his heart.
What you say, flows from what is in your heart!
21 Death and life are in the power of the tongue, And those who love it will eat its fruit.
18 There is one who speaks rashly like the thrusts of a sword, But the tongue of the wise brings healing.
29 Let no unwholesome word proceed from your mouth, but only such a word as is good for edification according to the need of the moment, so that it will give grace to those who hear.
5 So also the tongue is a small part of the body, and yet it boasts of great things.
See how great a forest is set aflame by such a small fire!
23 Watch over your heart with all diligence, For from it flow the springs of life.
10 Create in me a clean heart, O God, And renew a steadfast spirit within me.
9 “The heart is more deceitful than all else And is desperately sick; Who can understand it?
26 Moreover, I will give you a new heart and put a new spirit within you; and I will remove the heart of stone from your flesh and give you a heart of flesh.