'Unknown' in the Bible

and to another the working of miracles, and to another prophecy [foretelling the future, speaking a new message from God to the people], and to another discernment of spirits [the ability to distinguish sound, godly doctrine from the deceptive doctrine of man-made religions and cults], to another various kinds of [unknown] tongues, and to another interpretation of tongues.

So God has appointed and placed in the church [for His own use]: first apostles [chosen by Christ], second prophets [those who foretell the future, those who speak a new message from God to the people], third teachers, then those who work miracles, then those with the gifts of healings, the helpers, the administrators, and speakers in various kinds of [unknown] tongues.

For one who speaks in an unknown tongue does not speak to people but to God; for no one understands him or catches his meaning, but by the Spirit he speaks mysteries [secret truths, hidden things].

Now I wish that all of you spoke in unknown tongues, but even more [I wish] that you would prophesy. The one who prophesies is greater [and more useful] than the one who speaks in tongues, unless he translates or explains [what he says], so that the church may be edified [instructed, improved, strengthened].

Now, believers, if I come to you speaking in unknown tongues, how will I benefit you unless I also speak to you [clearly] either by revelation [revealing God’s mystery], or by knowledge [teaching about God], or by prophecy [foretelling the future, speaking a new message from God to the people], or by instruction [teaching precepts that develop spiritual maturity]?

So it is with you, if you speak words [in an unknown tongue] that are not intelligible and clear, how will anyone understand what you are saying? You will be talking into the air [wasting your breath]!

There are, I suppose, a great many kinds of languages in the world [unknown to us], and none is lacking in meaning.

Therefore let one who speaks in a tongue pray that he may [be gifted to] translate or explain [what he says].

For if I pray in a tongue, my spirit prays, but my mind is unproductive [because it does not understand what my spirit is praying].

Otherwise if you bless [and give thanks to God] in the spirit only, how will any outsider or someone who is not gifted [in spiritual matters] say the “Amen” [of agreement] to your thanksgiving, since he does not know what you are saying?

Therefore, [unknown] tongues are [meant] for a [supernatural] sign, not to believers but to unbelievers [who might be receptive]; while prophecy [foretelling the future, speaking a new message from God to the people] is not for unbelievers but for believers.

So then, if the whole church gathers together and all of you speak in [unknown] tongues, and outsiders or those who are not gifted [in spiritual matters] or unbelievers come in, will they not say that you are out of your mind?

Therefore, believers, desire earnestly to prophesy [to foretell the future, to speak a new message from God to the people], and do not forbid speaking in unknown tongues.