15 So what shall I do? I will pray with my spirit, but I will also pray with my understanding; I will sing with my spirit, but I will also sing with my understanding. 16 Otherwise when you are praising God in the Spirit, how can someone else, who is now put in the position of an inquirer,[1] say "Amen" to your thanksgiving, since they do not know what you are saying? 17 You are giving thanks well enough, but no one else is edified. 18 I thank God that I speak in tongues more than all of you. 19 But in the church I would rather speak five intelligible words to instruct others than ten thousand words in a tongue.
15 What is it then? I will pray with the spirit, and I will pray with the understanding also: I will sing with the spirit, and I will sing with the understanding also. 16 Else when thou shalt bless with the spirit, how shall he that occupieth the room of the unlearned say Amen at thy giving of thanks, seeing he understandeth not what thou sayest? 17 For thou verily givest thanks well, but the other is not edified. 18 I thank my God, I speak with tongues more than ye all: 19 Yet in the church I had rather speak five words with my understanding, that by my voice I might teach others also, than ten thousand words in an unknown tongue.
15 What am I to do? I will pray with my spirit, but I will pray with my mind also; I will sing praise with my spirit, but I will sing with my mind also. 16 Otherwise, if you give thanks with your spirit, how can anyone in the position of an outsider
15 So what's the solution? The answer is simple enough. Do both. I should be spiritually free and expressive as I pray, but I should also be thoughtful and mindful as I pray. I should sing with my spirit, and sing with my mind. 16 If you give a blessing using your private prayer language, which no one else understands, how can some outsider who has just shown up and has no idea what's going on know when to say "Amen"? 17 Your blessing might be beautiful, but you have very effectively cut that person out of it. 18 I'm grateful to God for the gift of praying in tongues that he gives us for praising him, which leads to wonderful intimacies we enjoy with him. I enter into this as much or more than any of you. 19 But when I'm in a church assembled for worship, I'd rather say five words that everyone can understand and learn from than say ten thousand that sound to others like gibberish.
15 What is the conclusion then? I will pray with the spirit, and I will also pray with the understanding. I will sing with the spirit, and I will also sing with the understanding. 16 Otherwise, if you bless with the spirit, how will he who occupies the place of the uninformed say "Amen" at your giving of thanks, since he does not understand what you say? 17 For you indeed give thanks well, but the other is not edified. 18 I thank my God I speak with tongues more than you all; 19 yet in the church I would rather speak five words with my understanding, that I may teach others also, than ten thousand words in a tongue.
15 Well then, what shall I do? I will pray in the spirit, and I will also pray in words I understand. I will sing in the spirit, and I will also sing in words I understand. 16 For if you praise God only in the spirit, how can those who don't understand you praise God along with you? How can they join you in giving thanks when they don't understand what you are saying? 17 You will be giving thanks very well, but it won't strengthen the people who hear you. 18 I thank God that I speak in tongues more than any of you. 19 But in a church meeting I would rather speak five understandable words to help others than ten thousand words in an unknown language.
Matthew Henry's Commentary on 1 Corinthians 14:15-19
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.