20Brothers and sisters, do not be children in your thinking; rather, be infants in evil, but in thinking be adults. 21In the law it is written, “By people of strange tongues and by the lips of foreigners I will speak to this people; yet even then they will not listen to me,” says the Lord. 22Tongues, then, are a sign not for believers but for unbelievers, while prophecy is not for unbelievers but for believers. 23If, therefore, the whole church comes together and all speak in tongues, and outsiders or unbelievers enter, will they not say that you are out of your mind? 24But if all prophesy, an unbeliever or outsider who enters is reproved by all and called to account by all. 25After the secrets of the unbeliever’s heart are disclosed, that person will bow down before God and worship him, declaring, “God is really among you.”
26What should be done then, my friends? When you come together, each one has a hymn, a lesson, a revelation, a tongue, or an interpretation. Let all things be done for building up. 27If anyone speaks in a tongue, let there be only two or at most three, and each in turn; and let one interpret. 28But if there is no one to interpret, let them be silent in church and speak to themselves and to God. 29Let two or three prophets speak, and let the others weigh what is said. 30If a revelation is made to someone else sitting nearby, let the first person be silent. 31For you can all prophesy one by one, so that all may learn and all be encouraged. 32And the spirits of prophets are subject to the prophets, 33for God is a God not of disorder but of peace.
39So, my friends, be eager to prophesy, and do not forbid speaking in tongues; 40but all things should be done decently and in order.