Proverbs 4:23

23Keep your heart with all vigilance,
for a  from it flow b  the springs of life.

Matthew 12:34

34 c  You brood of vipers! How can you speak good d  when you are evil? e  For out of the abundance of the heart the mouth speaks.

Matthew 15:16

16And he said, f  Are you also still without understanding?

Mark 7:20-23

20And he said, g  What comes out of a person is what defiles him. 21For from within, out of the heart of man, come evil thoughts, sexual immorality, theft h  murder, adultery, 22coveting, wickedness, deceit i  sensuality j  envy k  slander l  pride m  foolishness. 23 n  All these evil things come from within, and they defile a person.”

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