1 Corinthians 14:22 Meaning: Tongues and Prophecy, Who Is Each For?

The word for “sign” is sēmeion. In the New Testament it usually means a miracle that points to God’s power, something that makes you stop and pay attention. But in Paul’s quotation from Isaiah, the same word carries a heavier weight. There, the strange language was a warning. So sēmeion can be either an invitation or a judgment, depending on how the hearer responds.

The two Greek words for “believing” and “unbelieving” come from the same root. Pisteuō means to trust, to rely on. Apistos is the opposite, not simply someone who has never heard, but someone who refuses to trust. Paul sets up a clear contrast: gifts are matched to people. Prophecy nourishes trust. Tongues confront distrust.

Prophecy (prophēteia) is not just predicting the future. It means speaking God’s message, teaching, warning, encouraging, in a way people can understand. That is what builds faith.

Christian readers see different angles here. Many Reformed commentators, following John Calvin and John Gill, hear the echo of Isaiah as a threat: tongues are a sign of judgment on unbelief, much like the foreign invaders God sent against Israel. Matthew Henry and Wesley read it more gently: tongues are a miraculous sign meant to catch the attention of unbelievers and draw them in, as at Pentecost.

The Cambridge Bible frame it as both. The sign works like a call to examine and inquire. But if the hearer remains stubborn, the sign becomes a witness against them. Across traditions, the main agreement is that prophecy, clear, understandable speech, is the gift that builds the church, while tongues serve a different purpose, aimed mainly at those outside the faith.

Some read “tongues are for a sign to unbelievers” and conclude that speaking in tongues is a direct evangelistic tool that will convert people. In fact, Paul argues the opposite in the very next verses. When an unbeliever walks into a service where everyone is speaking in tongues, they think the believers are out of their minds. Prophecy is what convinces them. The “sign” is more about demonstrating God’s power or pronouncing judgment than about explaining the gospel.

This week, you might ask yourself: when I speak about my faith, in conversation, in a group, in a sermon, am I aiming to be understood? Paul’s point is not that spiritual experiences are wrong, but that other people matter more. The gift you most want to use may not be the one that helps the person right in front of you.

Think of one situation where you could trade “impressive” for “clear.” A short prayer, a honest explanation, a patient answer. That is prophecy in its everyday form, understandable words that carry truth into another person’s heart.