Yet in the church I had rather speak five words with my understanding, that by my voice I might teach others also, than ten thousand words in an unknown tongue.
That you might know the certainty of those things, in which you have been instructed.
I thank my God, I speak with tongues more than you all:
Brethren, be not children in understanding: but in malice be children, but in understanding be men.
He that speaks in an unknown tongue edifies himself; but he that prophesies edifies the church.