9. It is the same for you. If you do not speak clearly with your tongue, how will anyone know what is being said? For you will be speaking into the air.
10. There are probably many kinds of languages in the world, and none is without meaning.
11. If then I do not know the meaning of a language, I will be a foreigner to the speaker and the speaker a foreigner to me.
12. It is the same with you. Since you are eager for manifestations of the Spirit, seek to abound in order to strengthen the church.
13. So then, one who speaks in a tongue should pray that he may interpret.
14. If I pray in a tongue, my spirit prays, but my mind is unproductive.
15. What 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.