Matthew 15:18

Guard your heart with all diligence, For from it flow the springs of life.

“It is not what enters into the mouth that defiles the man, but what proceeds out of the mouth, this defiles the man.”

And He was saying, “That which proceeds out of the man, that is what defiles the man.

And the tongue is a fire, the very world of unrighteousness; the tongue is set among our members as that which defiles the entire body, and sets on fire the course of our existence, and is set on fire by hell.