I could see that, but there have to be people around who speak that language. An earlier poster said it is not any known language.
This is true about a specific form of tongues that is used in a prayer meeting where others are present, to address the group.
1 Cor 14:6-13
6 Now, brethren, if I come to you speaking in tongues, how shall I benefit you unless I bring you some revelation or knowledge or prophecy or teaching? 7 If even lifeless instruments, such as the flute or the harp, do not give distinct notes, how will any one know what is played? 8 And if the bugle gives an indistinct sound, who will get ready for battle? 9 So with yourselves; if you in a tongue utter speech that is not intelligible, how will any one know what is said? For you will be speaking into the air. 10 There are doubtless many different languages in the world, and none is without meaning; 11 but if I do not know the meaning of the language, I shall be a foreigner to the speaker and the speaker a foreigner to me. 12 So with yourselves; since you are eager for manifestations of the Spirit, strive to excel in building up the church. 13 Therefore, he who speaks in a tongue should pray for the power to interpret.
v22
…tongues are a sign not for believers but for unbelievers, while prophecy is not for unbelievers but for believers. 23 If, therefore, the whole church assembles and all speak in tongues, and outsiders or unbelievers enter, will they not say that you are mad?
1 Cor 14:26-28
26 What then, brethren? When you come together, each one has a hymn, a lesson, a revelation, a tongue, or an interpretation. Let all things be done for edification. 27 If any speak in a tongue, let there be only two or at most three, and each in turn; and let one interpret. 28 But if there is no one to interpret, let each of them keep silence in church and speak to himself and to God.
There is a form of tongues that should be used in the meeting only if it is interpreted. If there is no one to interpret, then it should be kept private. This is an Apostolic ruling that is unfortunately ignored in the ecclesial communities of our separated brethren, the fruit of which is exactly what the Apostle states - “will they not think you are mad”? And indeed, that is what is thought.
It is not the type that was used at Pentecost, as this was the Apostles speaking in their own language, and others HEARING in their own.
And an non-understandable “language” is needed for this?
Of course not! One can extol God in a variety of ways, in their own language, song, art, dance, etc. Ideally our lives should extol God.
But this is a specific form of prayer that disconnects the mind, so that a person can focus on the Spirit.
1 Cor 14:13-15
14 For if I pray in a tongue, my spirit prays but my mind is unfruitful. 15 What am I to do? I will pray with the spirit and I will pray with the mind also; I will sing with the spirit and I will sing with the mind also.
There are many of us whose minds are much too busy, and we struggle achieving the state of contempletive prayer that we ought. In such cases, the Spirit helps us in our weakness, and we are able to use tongues to disengage our busy minds, and allow the mind to be “unfruituful” while the Spirit prays.
I think this is what guanophore was talking about in post 115, but still there have to be others around who understand it.
Yes, when it is used in the congregation it is not to be used without interpretation. Private prayer in tongues can be used at all times. I recommend reading I Cor. 12-14, these chapters will answer your questions.
One is to extol God, as we see in Acts. Another is to instruct, as noted above, and one is to build up the individual in their prayer life, so that they can better serve God and the Body of Christ.
1 Cor 14:1-5
2 For one who speaks in a tongue speaks not to men but to God; for no one understands him, but he utters mysteries in the Spirit. 3 On the other hand, he who prophesies speaks to men for their upbuilding and encouragement and consolation. 4
He who speaks in a tongue edifies himself, but he who prophesies edifies the church. 5 Now I want you all to speak in tongues, but even more to prophesy. He who prophesies is greater than he who speaks in tongues, unless some one interprets,
so that the church may be edified.