Bible Verses About thought

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

Thou wilt keep him in perfect peace, whose mind is stayed on thee: because he trusteth in thee.

And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God.

Casting down imaginations, and every high thing that exalteth itself against the knowledge of God, and bringing into captivity every thought to the obedience of Christ;