Proverbs 10:20
The tongue of the upright man is like tested silver: the heart of the evil-doer is of little value.
Proverbs 12:18
There are some whose uncontrolled talk is like the wounds of a sword, but the tongue of the wise makes one well again.
Genesis 6:5
And the Lord saw that the sin of man was great on the earth, and that all the thoughts of his heart were evil.
Genesis 8:21
And when the sweet smell came up to the Lord, he said in his heart, I will not again put a curse on the earth because of man, for the thoughts of man's heart are evil from his earliest days; never again will I send destruction on all living things as I have done.
Proverbs 8:19
My fruit is better than gold, even than the best gold; and my increase is more to be desired than silver.
Proverbs 15:4
A comforting tongue is a tree of life, but a twisted tongue is a crushing of the spirit.
Proverbs 16:13
Lips of righteousness are the delight of kings; and he who says what is upright is dear to him.
Proverbs 23:7
For as the thoughts of his heart are, so is he: Take food and drink, he says to you; but his heart is not with you.
Proverbs 25:11-12
A word at the right time is like apples of gold in a network of silver.
Jeremiah 17:9
The heart is a twisted thing, not to be searched out by man: who is able to have knowledge of it?
Matthew 12:34-35
You offspring of snakes, how are you, being evil, able to say good things? because out of the heart's store come the words of the mouth.