Yet in the church I would 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 that I speak with tongues more than you all:
Brethren, do not be children in understanding: however in malice you should be children, but in understanding you should be men.
He who speaks in an unknown tongue edifies himself; but he who prophesies edifies the church.