You obviously either don't know or are choosing to overlook the fact that there are two types of tongues, one that calls for an interpretation,this is the gift of tongues, and another which is the evidence of the baptism of the Holy Ghost,which is a prayer language,that requires no interpretation,and it's purpose is to strengthen and build up of the one doing it,it also gives us the ability to pray the perfect will of God,which means it is doing the job that is was designed to do.
This is pure assertion without the slightest bit of scripture to back it up.
When Jesus was baptised, did he speak in tongues? After all, the H Sp descended visibly on Him, like a dove. As far as we know, the answer to that is 'No'.
So if He is our example, then what example do you see there about speaking in tongues?
And yes ,it is true ,that if the first type is spoken out loud it requires an interpretation.(gift of tongues),this also the type that Paul is referring to when he say's that not all speak in tongues,meaning not all have this gift.
If not all have this gift, then it is not a mark of salvation or anything else, really.
And it is also true ,that the prayer language tongues are not to be spoken aloud in the presense of unbelievers,like you quoted above, because they would think we were mad.
I wonder where you get this idea about 'prayer language tongues'?
Look, I believe that if scripture shows me plainly that something is to be done, I go with that. I thought about what you said, and what do I find in Scripture?
David and others wrote 150 psalms - which were all prayers to be sung. What language? Hebrew - the language known to everybody in Israel at the time.
Daniel. Jeremiah, Hezekiah, Solomon all prayed to God. In what language? Hebrew. How do we know? They've written them down for our benefit.
Jesus prayed to His Father too. In what language? Greek/Aramaic, known to everybody. How do we know? The prayers are written down for our benefit.
The disciples heard Him praying, and were so impressed by what they heard, they asked Him to teach them. So He did. And what did He teach them? Some unintelligible language? No, Greek/ Aramaic. How do we know? It's written down for us to benefit from.
Furthermore, He commands them too:
After this manner therefore, pray ye...
I see nothing about any prayer language here.
I look into the Acts, and what do I find? They are all praying intelligibly - and what they said is written down for us to benefit from.
I find an angel praying too - so here is the tongue of angels. What language is it? Greek.
Re 16:5 And I heard the angel of the waters say, Thou art righteous, O Lord, which art, and wast, and shalt be, because thou hast judged thus.
How do we know? It's written down there for our benefit.
Futher more ,I have never seen the gift of tongues(the one that requires an interpretation) fail to be interpreted.
And if you were ever present in a service where this happened,you would no longer be an unbeliever, because just before this happens,there is such a quite hush and stillness that comes over the whole congregation,you could hear a pin drop,even the babies make no sound,then the one with the gift of tongues speaks,then the interpretation comes,usually through a different person,the presense of God is so tangable and heavy,before during and after one can hardly stand it.
I had a very learned friend who went to one of these meetings and spoke in tongues. The interpreter happily interpreted away.
Not wishing to embarrass anybody, my friend left. He had been reciting Homer's
Iliad in the original, and reckoned that Homer would have been very surprised to hear that that was what he had written down!
I'll say no more.
One more thing, you said
"Paul states quite clearly that the purpose of tongues was to speak prophetically TO THE JEWS. Here's a newer version on the matter: HCSB
How in the world do you get that Paul was saying that this is the purpose of tongues out of this scripture?
I thought it was perfectly obvious.
21 ¶ It is written in the law:
By people of other languages
and by the lips of foreigners,
I will speak to this people;
and even then, they will not listen to Me,
Who do you think
'this people' is?
If you look back at Isa 28, you'll see that it was the Jews.
It couldn't be the church, because they had
listened and obeyed
already.
It couldn't be individuals, because 'people' means a nation.
So who else but the Jews?
This agrees perfectly with what Jesus Himself said. Have you ever read John 15 about the coming of the comforter? Here it is, and he tells us why it was coming. ESV:
26 ¶ “But when the Helper comes, whom I will send to you from the Father, the Spirit of truth, who proceeds from the Father, he will bear witness about me.
Bear witness? To whom? The church? Themselves personally? Who?
27 And you also will bear witness, because you have been with me from the beginning.
Bear witness? To whom? The church? Themselves personally? Who?
1 ¶ “I have said all these things to you to keep you from falling away.
He now explains precisely who He means:
2 They will put you out of the synagogues. Indeed, the hour is coming when whoever kills you will think he is offering service to God.
3 And they will do these things because they have not known the Father, nor me.
So who do you think is going to put them out of synagogues, kill them, didn't know God or Jesus?
Yes, the Jews.
So there we have the exact purpose of the coming of the Holy Spirit. There is no doubt about it at all.
And just in case you want a bit more proof, Here's Peter on the day of Pentecost, talking to the Jews:
32 This Jesus has God raised up, whereof we all are witnesses.
33 Therefore being by the right hand of God exalted, and having received of the Father
the promise of the Holy Ghost,
he has shed forth this, which you now see and hear.
What did they see and hear? The apostles speaking in all the languages of those who had come to Jerusalem from every corner of the earth. Not gibberish, or any 'personal prayer language'.
What was the consequence of this? Thousands believed and were baptised - and then persecution arose.
Remember what Saul did? Expelling them from the synagogues, killing and imprisoning them? Just as Jesus had said?
John 15.2
They shall put you out of the synagogues: yes, the time comes, that whoever kills you will think that he does God service.
3 And these things will they do to you, because they have not known the Father, nor me.
I hope that answers your question.
