15 What then is it? I will pray with the spirit, and I will pray also with the understanding; I will sing psalms with the spirit, and I will sing psalms also with the understanding; 16 since, if thou mayest bless with the spirit, he who is filling the place of the unlearned, how shall he say the Amen at thy giving of thanks, since what thou dost say he hath not known? 17 for thou, indeed, dost give thanks well, but the other is not built up! 18 I give thanks to my God—more than you all with tongues speaking— 19 but in an assembly I wish to speak five words through my understanding, that others also I may instruct, rather than myriads of words in an 'unknown' tongue. 20 Brethren, become not children in the understanding, but in the evil be ye babes, and in the understanding become ye perfect;
21 in the law it hath been written, that, 'With other tongues and with other lips I will speak to this people, and not even so will they hear Me, saith the Lord;' 22 so that the tongues are for a sign, not to the believing, but to the unbelieving; and the prophesy 'is' not for the unbelieving, but for the believing, 23 If, therefore, the whole assembly may come together, to the same place, and all may speak with tongues, and there may come in unlearned or unbelievers, will they not say that ye are mad? 24 and if all may prophecy, and any one may come in, an unbeliever or unlearned, he is convicted by all, he is discerned by all, 25 and so the secrets of his heart become manifest, and so having fallen upon 'his' face, he will bow before God, declaring that God really is among you.
Matthew Henry's Commentary on 1 Corinthians 14:15-25
Commentary on 1 Corinthians 14:15-25
(Read 1 Corinthians 14:15-25)
There can be no assent to prayers that are not understood. A truly Christian minister will seek much more to do spiritual good to men's souls, than to get the greatest applause to himself. This is proving himself the servant of Christ. Children are apt to be struck with novelty; but do not act like them. Christians should be like children, void of guile and malice; yet they should not be unskilful as to the word of righteousness, but only as to the arts of mischief. It is a proof that a people are forsaken of God, when he gives them up to the rule of those who teach them to worship in another language. They can never be benefitted by such teaching. Yet thus the preachers did who delivered their instructions in an unknown tongue. Would it not make Christianity ridiculous to a heathen, to hear the ministers pray or preach in a language which neither he nor the assembly understood? But if those who minister, plainly interpret Scripture, or preach the great truths and rules of the gospel, a heathen or unlearned person might become a convert to Christianity. His conscience might be touched, the secrets of his heart might be revealed to him, and so he might be brought to confess his guilt, and to own that God was present in the assembly. Scripture truth, plainly and duly taught, has a wonderful power to awaken the conscience and touch the heart.