For if I pray in another language, my spirit prays, but my understanding is unfruitful.
Therefore let him who speaks in another language pray that he may interpret.
However in the assembly I would rather speak five words with my understanding, that I might instruct others also, than ten thousand words in another language.
For he who speaks in another language speaks not to men, but to God; for no one understands; but in the Spirit he speaks mysteries.