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

Matthew 12:34
You brood of vipers, how can you who are evil say anything good? For out of the overflow of the heart, the mouth speaks.

Matthew 15:18
But the things that come out of the mouth come from the heart, and these things defile a man.

Matthew 15:19
For out of the heart come evil thoughts, murder, adultery, sexual immorality, theft, false testimony, and slander.

Mark 7:21
For from within the hearts of men come evil thoughts, sexual immorality, theft, murder, adultery,

Luke 6:45
The good man brings good things out of the good treasure of his heart, and the evil man brings evil things out of the evil treasure of his heart. For out of the overflow of the heart, the mouth speaks.

Deuteronomy 4:9
Only be on your guard and diligently watch yourselves, so that you do not forget the things your eyes have seen, and so that they do not slip from your heart as long as you live. Teach them to your children and grandchildren.

2 Kings 10:31
Yet Jehu was not careful to follow the instruction of the LORD, the God of Israel, with all his heart. He did not turn away from the sins that Jeroboam had caused Israel to commit.

Proverbs 23:19
Listen, my son, and be wise, and guide your heart on the right course.

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