The Bible says, “Guard your heart, . . .”
The Bible does not say, “Follow your heart.”

The Bible says, “Guard your heart with all diligence, for from it flow the springs of life.”

The Bible says, “As a man thinks in his heart, so is he.”

The Bible says, “The heart is deceitful above all things, and desperately wicked; who can know it?”

The Bible says, “But those things which proceed out of the mouth come forth from the heart; and they defile the man.”

The Bible says, “For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies.”

The Bible says, “Purify your hearts, for your loyalty is divided between God and the world.”
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The Bible says, “Create in me a clean heart, O God, and renew a right spirit within me.”