Paul says: “(For the weapons of our warfare are not carnal, but mighty through God to the pulling down of strong holds 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;” (2 Corinthians 10:4–5)
“Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good report; if there be any virtue, and if there be any praise, think on these things.” (Philippians 4:8)
“Thou wilt keep him in perfect peace, Whose mind is stayed on thee: Because he trusteth in thee.” (Isaiah 26:3)