1 Corinthians 14:22-24

Living Bible

²² So you see that being able to “speak in tongues” is not a sign to God’s children concerning his power, but is a sign to the unsaved. However, prophecy (preaching the deep truths of God) is what the Christians need, and unbelievers aren’t yet ready for it. ²³ Even so, if an unsaved person, or someone who doesn’t have these gifts, comes to church and hears you all talking in other languages, he is likely to think you are crazy. ²⁴ But if you prophesy, preaching God’s Word, even though such preaching is mostly for believers,^[a] and an unsaved person or a new Christian comes in who does not understand about these things, all these sermons will convince him of the fact that he is a sinner, and his conscience will be pricked by everything he hears.