“Therefore let him who speaks in a tongue pray that he may interpret. For if I pray in a tongue, my spirit prays, but my understanding is unfruitful. 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. 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? For you indeed give thanks well, but the other is not edified.”
I Corinthians 14:13-17 NKJV
The Church of Corinth was not a perfect church. Most of Paul’s letters had significant aspects of correction for the churches to which he was writing. Corinth had much to be corrected, in this chapter mostly due to their zeal rather than any blatant rebellion, especially in the area of spiritual gifts and specifically in the area of tongues. Paul wasn’t dousing their zeal, but rather trying to define it and direct it.