When writing to Christians in the city of Corinth, some of whom apparently could speak in tongues, Paul explained that “tongues are for a sign... to the unbelievers. ”
Paulus selgitas kirjas Korintose kristlastele, kellest mõned arvatavasti rääkisid keeltega, et „keeled [pole] tundemärgiks usklikele, vaid uskmatutele ”.