1 Corinthians 14:18-21

I thank God that I speak in [unknown] tongues more than all of you; nevertheless, in public worship I would rather say five understandable words in order to instruct others, than ten thousand words in a tongue [which others cannot understand]. Brothers and sisters, do not be children [immature, childlike] in your thinking; be infants in [matters of] evil [completely innocent and inexperienced], but in your minds be mature [adults]. It is written in the Law, “BY MEN OF STRANGE TONGUES AND BY THE LIPS OF FOREIGNERS I WILL SPEAK TO THIS PEOPLE, AND NOT EVEN THEN WILL THEY LISTEN TO ME,” says the Lord. [Is 28:11, 12]