Charles Ellicott Commentary 1 Corinthians 14:24

"But if all prophesy, and there come in one unbelieving or unlearned, he is reproved by all, he is judged by all;" — 1 Corinthians 14:24 (ASV)

But if all prophesy.—There is no danger of exaggeration regarding this gift. Each one uttering prophecy, telling forth the gospel truth, and revealing the mind of God, will have a message that will be useful to the unbeliever.

As one after another they utter the words of divine truth, they each send something that pierces into his soul. By all of them he is convicted in his own conscience of some sin. He is condemned in his own eyes, a searching light is turned upon his heart. The secrets of his heart are made manifest, and he makes terrible discoveries of his guilt (Hebrews 4:12–13).