but in the church I would rather speak five words with my understanding, in order that I may instruct others, rather than ten thousand words in an unknown tongue.
so that you may know the certainty of those things in which you were instructed.
I thank my God I speak with tongues more than you all;
Brothers, do not be children in your understanding; rather, in malice be children, but in understanding be men.
He who speaks in an unknown tongue edifies himself, but he who prophesies edifies the church.