Thank you very much for your explanations! I would like to add something for Webmaster.
First of all, thank you for pointing out scripture.
I left a Pentecost church, because I was scared out of my mind. Someone spoke in tongues and I was given this feeling that I can't explain. But it was almost as though the Holy Spirit was crying "liar". I didn't know if it was real before, but that time I knew it was a lie...I left (after church). I kept my mouth shut, but I felt the spirit (I think) so strongly that it kept all of my strength not to shout "liar" myself. I had to leave the church.
And one more question for Bob. Your explanation was helpful, but I am still a little confused. Is it then that the tongues were for others to understand so we were capable of spreading the word or was it a language that only the followers of Christ knew? This is a hard subject for me to grasp completely. And thank you so much for the scripture you pointed out to me that is very helpful.