Guard your mind more than anything you own, for mind is the source of your reality.
Keep away from crooked speech, and avoid clever talk.
Fix your eyes forward; keep your gaze steady and straight.
Carefully examine the course you choose, and all your ways will prosper.
Deviate neither to the right nor the left, and keep your feet from evil.
— Proverbs 4:23-27
You are what you do, but what you do depends on how you think; so guard your thoughts from irrationality and falsehood. Do not shun evil thoughts; simply do not cling to them. When evil is seen to be evil, harmful to self and others, you will not do it. But if your mind is lost in false thinking, you will call evil “good” and praise yourself as you perpetuate it.
Deviating to the right or the left, letting your mind wander from truth into falsehood, is the danger; staying centered is the challenge. If you walk with a spacious mind, your feet will not lead you into temptation.