Therefore, one who speaks in a tongue should pray that he may interpret.
13. Wherefore let him that speaketh in another tongue This is an anticipation, by way of reply to a question which might very readily be proposed to him. “If any one, therefore, is able to speak a foreign language, will the gift be useless? Why should that be kept back, which might be brought out to light, to the glory of God?” He shows the remedy.
In this paragraph he goes on to show how vain a thing the ostentation of speaking unknown and unintelligible language must be. It was altogether unedifying and unprofitable (Co1 14:6): If I come to you speaking with tongues, what will it profit you, unless I speak to you by revelation, or by knowledge, or by prophesying, or by doctrine?
Commenting on 1 Corinthians 14:6-14
Wherefore let him that speaketh in an unknown tongue,.... The Hebrew, or any other, the gift of speaking with which is bestowed upon him: pray that he may interpret; that he may have also the gift of interpretation of tongues; for as has been before hinted, these two gifts were distinct; and a man might have the one, and not the other; a man might...