Old/New Testament

Paul shows that the gift of prophecy (that is, of interpreting or preaching) excels the gift of languages, and how they both ought to be used.

14 Labour for love, and covet spiritual gifts, and most chiefly to prophesy. ² For he who speaks in an unknown tongue speaks not to people, but to God, for no one understands him. However, in the Spirit he speaks mysteries. ³ But he who prophesies speaks to people, for edifying, for exhortation, and for comfort. ⁴ He who speaks in an unknown tongue, profits himself; he who prophesies, edifies the congregation.

⁵ I would that you all spoke with tongues, but rather that you prophesied. For greater is he who prophesies than he who speaks with tongues – unless he expounds it also, so that the congregation may have edifying. ⁶ Now brethren, if I come to you speaking with tongues, how do I profit you, unless I speak to you either by revelation, or by knowledge, or by instruction?

⁷ Moreover, when things without life give sound, whether it be a pipe or a harp, unless they make a distinction in the sounds, how can it be known what is piped or harped? ⁸ And also, if the trumpet gives an uncertain call, who will prepare himself to fight? ⁹ So also likewise, when you speak with tongues, unless you speak words that have meaning, how can it be understood what is spoken? For you will be but speaking in the air.

¹⁰ Many kinds of voices are in the world, and none of them are without signification. ¹¹ If I do not know what the voice means, I will be as a foreigner to him who speaks, and he who speaks will be a foreigner to me. ¹² So then, since you covet spiritual gifts, seek to have them in plenty for the edifying of the congregation.

¹³ Therefore let him who speaks in an unknown tongue pray such that he may interpret also. ¹⁴ If I pray in an unknown tongue, my spirit prays, but my understanding brings no one fruit. ¹⁵ What is it then? I will pray with the spirit, and will pray with the meaning also. I will sing with the spirit, and will sing with the meaning also. ¹⁶ For otherwise, when you bless with the spirit, how can the person who is unlearned say Amen at your giving of thanks, seeing he does not understand what you say? ¹⁷ You give thanks well, but the other is not edified. ¹⁸ I thank my God that I speak with tongues more than you all, ¹⁹ yet in the congregation I would rather speak five words with my meaning for the information of others, than ten thousand words in an unknown tongue.

²⁰ Brethren, do not be children in understanding. As concerning evil, be children, but in understanding be mature.