1 Corinthians 14:14

Catholic Public Domain Version

So, if I pray in tongues, my spirit prays, but my mind is without fruit.

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For this reason, too, whoever speaks in tongues, let him pray for the interpretation.

But in the Church, I prefer to speak five words from my mind, so that I may instruct others also, rather than ten thousand words in tongues.

For whoever speaks in tongues, speaks not to men, but to God. For no one understands. Yet by the Spirit, he speaks mysteries.