Perhaps it is true that there’s no single passage from the Bible that is the most powerful against evil.
The devil hates every word of it all.
But there are some that seem to stand out.
There’s James 4:7, which instructs believers to submit to God and resist the devil, and Luke 10:19—wherein Jesus grants authority to overcome the enemy’s power. Ephesians 6:10-18 describes the “full armor of God,” including the “sword of the Spirit, which is the Word of God.” Turn likewise to Matthew 4:1-11.
And how about Isaiah 54:17: “No weapon forged against you will prevail”?
But it is said, at least by one deliverance minister, that in casting out especially tricky, hidden evil, no scripture is more powerful in exposing and bringing that out—causing it to manifest—than 1 John 4:4-6: “You are from God, little children, and have overcome them; because greater is He Who is in you than he who is in the world.”
“They are from the world; therefore they speak as from the world, and the world listens to them.
“We are from God; he who knows God listens to us; he who is not from God does not listen to us. By this we know the spirit of truth and the spirit of error.”
+

