9 So if you, in using a strange tongue, say words which have no sense, how will anyone take in what you are saying? for you will be talking to the air. 10 There are, it may be, a number of different voices in the world, and no voice is without sense. 11 But if the sense of the voice is not clear to me, I am like a man from a strange country to him who is talking, and he will be the same to me. 12 So if you are desiring the things which the Spirit gives, let your minds be turned first to the things which are for the good of the church. 13 For this reason, let the man who has the power of using tongues make request that he may, at the same time, be able to give the sense. 14 For if I make use of tongues in my prayers, my spirit makes the prayer, but not my mind.
15 What then? let my prayer be from the spirit, and equally from the mind; let my song be from the spirit, and equally from mind. 16 For if you give a blessing with the spirit, how will the man who has no knowledge say, So be it, after your prayer, seeing that he has not taken in what you are saying? 17 For your giving of the blessing is certainly well done, but of no profit to the man without knowledge. 18 I give praise to God that I am able to make use of tongues more than you all: 19 But in the church it would be better for me to make use of five words of which the sense was clear, so that others might have profit, than ten thousand words in a strange tongue.
Matthew Henry's Commentary on 1 Corinthians 14:9-19
Commentary on 1 Corinthians 14:6-14
(Read 1 Corinthians 14:6-14)
Even an apostle could not edify, unless he spoke so as to be understood by his hearers. To speak words that have no meaning to those who hear them, is but speaking into the air. That cannot answer the end of speaking, which has no meaning; in this case, speaker and hearers are barbarians to each other. All religious services should be so performed in Christian assemblies, that all may join in, and profit by them. Language plain and easy to be understood, is the most proper for public worship, and other religious exercises. Every true follower of Christ will rather desire to do good to others, than to get a name for learning or fine speaking.
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.