Proverbs 10:20
The tongue of a righteous man is choice silver. The heart of the wicked is little worth.
Proverbs 12:18
There is he who speaks rashly like the piercings of a sword, but the tongue of the wise is health.
Genesis 6:5
And LORD saw that the wickedness of man was great on the earth, and that every imagination of the thoughts of his heart was only evil continually.
Genesis 8:21
And LORD smelled the sweet savor. And LORD said in his heart, I will not again curse the ground any more for man's sake, for that the imagination of man's heart is evil from his youth. Neither will I again any more smite everything
Proverbs 8:19
My fruit is better than gold, yea, than fine gold, and my revenue than choice silver.
Proverbs 15:4
A gentle tongue is a tree of life, but perverseness in it is a breaking of the spirit.
Proverbs 16:13
Righteous lips are the delight of kings, and they love him who speaks right.
Proverbs 25:11-12
A word fitly spoken is apples of gold in a network of silver.
Jeremiah 17:9
The heart is deceitful above all things, and it is exceedingly corrupt. Who can know it?
Matthew 12:34-35
Ye offspring of vipers, how can ye, being evil, speak good things? For out of the abundance of the heart the mouth speaks.