For he who speaks in a tongue does not speak to men but to God, for no one understands him; however, in the spirit he speaks mysteries.

What is it then? I will pray with the spirit, and I will also pray with the mind. I will sing with the spirit, and I will also sing with the mind.

Otherwise, if you praise in the spirit, how will he who occupies the place set apart for the unlearned say Amen at your giving of thanks, since he does not understand what you say?

yet in the church I would rather speak five words with my mind, that I may teach others also, than ten thousand words in a tongue.