15 So what should I do? I will pray with my spirit. But I will also pray with my mind. I will sing with my spirit. But I will also sing with my mind.
16 Suppose you are praising God with your spirit. And suppose there are visitors among you who don't understand what's going on. How can they say "Amen" when you give thanks? They don't know what you are saying.
17 You might be giving thanks well enough. But the others are not being built up.
18 I thank God that I speak in other languages more than all of you do.
19 But in the church I would rather speak five words that people can understand than 10,000 words in another language. Then I would be teaching others.
20 Brothers and sisters, stop thinking like children. Be like babies as far as evil is concerned. But be grown up in your thinking.
21 In the Law it is written, "Through people who speak unfamiliar languages and through the lips of strangers I will speak to these people. But even then they will not listen to me." (Isaiah 28:11,12) That is what the Lord says.