Matthew

Keep thy heart with all diligence; for out of it are the issues of life.

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.

They have not known nor understood: for he hath shut their eyes, that they cannot see; and their hearts, that they cannot understand.

But those things which proceed out of the mouth come forth from the heart; and they defile the man.

Let no corrupt communication proceed out of your mouth, but that which is good to the use of edifying, that it may minister grace unto the hearers.