What does babbling and Matthew 6:9 have to do with each other? When, say, cars were first purchased by the public, shortly thereafter the realization set in that rules had to be engaged to operate them properly. That's is akin to Paul's mention and INSTRUCTION of tongues to the Corinthian church. He, by the leading of the Holy Spirit, set up guidelines for the operation of the church and not just tongues only. These letters were copied, passed around and read in most, if not all the churches. There was no need to keep harping, there were written instructions available. Yes, Paul wrote that prophecies shall fail; tongues shall cease; and knowledge, it shall vanish away in 1 Cor 13:8. But that only happens when " that which is perfect is come " in verse 10. Now if you say that " that which is perfect " is scripture, the completed bible ( I have heard it argued ) than prophecies have failed, tongues have ceased and KNOWLEDGE HAS VANISHED AWAY. Is that true? You can't cherry pick, you KNOW that knowledge has not vanished away. The bible, as we know it today. was finalized in the 16th century. Did tongues last until then? How about the Latin Vulgate in the 4th century? The Apostle Paul, in 1 Corinthians 13:1, said " Though I speak with the tongues of men AND OF ANGELS, and have not charity, I am become as sounding brass, or a tinkling cymbal." This is clearly two different methods of speaking in tongues, one exampled in Acts 2 and the other referenced by none other than Jesus in Mark 16:17- " And these signs shall follow them that believe; in My Name shall they cast out devils; they SHALL SPEAK WITH NEW TONGUES; They shall take up serpents; and if they drink any deadly thing, it shall not hurt them; they shall lay hands on the sick, and they shall recover." If you don't believe those signs follow you, they won't. They operate by faith, and faith works by love.