5I wish you all spoke in tongues, but even more that you would prophesy. The one who prophesies is greater than the one who speaks in tongues, unless he interprets so that the church may be strengthened.
6Now, brothers and sisters, if I come to you speaking in tongues, how will I help you unless I speak to you with a revelation or with knowledge or prophecy or teaching?
7It is similar for lifeless things that make a sound, like a flute or harp. Unless they make a distinction in the notes, how can what is played on the flute or harp be understood?
15What should I do? I will pray with my spirit, but I will also pray with my mind. I will sing praises with my spirit, but I will also sing praises with my mind.
16Otherwise, if you are praising God with your spirit, how can someone without the gift say "Amen" to your thanksgiving, since he does not know what you are saying?
21It is written in the law: "By people with strange tongues and by the lips of strangers I will speak to this people, yet not even in this way will they listen to me," says the Lord.
23So if the whole church comes together and all speak in tongues, and unbelievers or uninformed people enter, will they not say that you have lost your minds?
25The secrets of his heart are disclosed, and in this way he will fall down with his face to the ground and worship God, declaring, "God is really among you."
26What should you do then, brothers and sisters? When you come together, each one has a song, has a lesson, has a revelation, has a tongue, has an interpretation. Let all these things be done for the strengthening of the church.