141 Go after a life of love as if your life depended on it - because it does. Give yourselves to the gifts God gives you. Most of all, try to proclaim his truth. 2 If you praise him in the private language of tongues, God understands you but no one else does, for you are sharing intimacies just between you and him. 3 But when you proclaim his truth in everyday speech, you're letting others in on the truth so that they can grow and be strong and experience his presence with you. 4 The one who prays using a private "prayer language" certainly gets a lot out of it, but proclaiming God's truth to the church in its common language brings the whole church into growth and strength. 5 I want all of you to develop intimacies with God in prayer, but please don't stop with that. Go on and proclaim his clear truth to others. It's more important that everyone have access to the knowledge and love of God in language everyone understands than that you go off and cultivate God's presence in a mysterious prayer language - unless, of course, there is someone who can interpret what you are saying for the benefit of all.
Matthew Henry's Commentary on 1 Corinthians 14:1-5
Commentary on 1 Corinthians 14:1-5
(Read 1 Corinthians 14:1-5)
Prophesying, that is, explaining Scripture, is compared with speaking with tongues. This drew attention, more than the plain interpretation of Scripture; it gratified pride more, but promoted the purposes of Christian charity less; it would not equally do good to the souls of men. What cannot be understood, never can edify. No advantage can be reaped from the most excellent discourses, if delivered in language such as the hearers cannot speak or understand. Every ability or possession is valuable in proportion to its usefulness. Even fervent, spiritual affection must be governed by the exercise of the understanding, else men will disgrace the truths they profess to promote.