A man’s heart determines his speech - Matthew 12:34
The heart is more deceitful than all else, and is desperately sick; who can understand it? - Jeremiah 17:9
Man looks at the outward appearance, but God looks at the heart - 1Samuel 16:7
As in water face reflects face, so the heart of man reflects man - Proverbs 27:19
But those things that proceed out of the mouth come from the heart, and they defile a man - Matthew 15:18