I'm jumping in here with you and
@quietthinker
Reading what you are both writing seems to be two different things.
When we speak in tongues it is indeed worship and to God. We don't understand it but we 'do' in our spirit man and are built up in our holy faith.
What
@quietthinker is talking about is..( as I read it, but maybe wrong)
..that the visitors and multitude at Pentecost each heard Peters sermon ( which is written in acts ) as the apostles spoke in tongues , they heard God word to them... The mockers thought they were all drunk because 'they' did not understand what was going on.
I know one missionary lady. Miss Fox, who when in Africa in a village who dialect she could not understand , opened her mouth at the prompting of the Lord, and utters tongues that she did not understand...but the village heard God's word, and even the witchdoctor was touched by God and almost the whole village got saved. God in action, nothing of her...
To see Miss Fox, she looked like a regular oldish lady heading off to shop at the local grocery store... but very powerful in the pulpit when God fell upon her. :)