Treasury of Scripture Knowledge
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.
1 Corinthians 14:4
he that speaks in an unknown tongue, edifies himself alone: but he that expounds, edifies the church.
1 Corinthians 12:7
now to particular men the spirit gives particular gifts, that they may be displayed to greater advantage.