1 Corinthians 14:20-25

Living_Oracles(i) 20 Brethren, be not children in understanding; but in evil be children, and in understanding be full grown men. 21 In the law it is written, "Surely, with other tongues, and with other lips, I will speak to this people; yet not even then will they hearken to me, says the Lord." 22 So that foreign languages are for a sign; not to believers, but to unbelievers: but prophecy is for a sign; not to unbelievers, but to believers. 23 If, then, the whole congregation be come together in one place, and all speak in foreign languages; and there come in unlearned persons, or unbelievers, will they not say that you are mad? 24 But if all prophesy, and there come in an unbeliever, or an unlearned person, he is corrected by all, he is examined by all; 25 the hidden things of his heart are made manifest: and so, falling on his face, he will worship God, publishing that God is actually among you.