I thank my God. — Here the Apostle resumes in the first person, coming back, after the parenthesis, to the continuation of his own desire and example. He does not undervalue that gift the misuse and exaggeration of which he is censuring; he possesses it himself in a remarkable degree; yet in the Church (i.e., in any assembly of Christians for prayer or instruction) he would prefer to speak five words with his mind rather than ten thousand with a tongue only; for the object of such assemblies is not private prayer or private ecstatic communion with God, but the edification of others. The word used for “teach” in this verse is literally our word catechise.
1 Corinthians 14:18-19
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.