18I thank God that I speak in tongues more than all of you.
19But in the church, I would rather speak five coherent words to instruct others than ten thousand words in a tongue.
20Brothers, stop thinking like children. In regard to evil be infants, but in your thinking be mature.
21It is written in the Law:
“By strange tongues and foreign lips
I will speak to this people,
but even then they will not listen to Me,
says the Lord.”
22Tongues, then, are a sign, not for believers, but for unbelievers. Prophecy, however, is for believers, not for unbelievers.
23So if the whole church comes together and everyone speaks in tongues, and some who are uninstructed or some unbelievers come in, will they not say that you are out of your minds?
— 1 Corinthians 14:18-23

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