I went to a church where the whole congregation was speaking in tongues. I was told that they were speaking to God. As a very young child, I was very afraid & have always wondered about whether they were talking to God because every word sounded like gibberish and I was told that only God understands what they were saying.
1 Corinthians 14:1 - 40
ESV - 1 Pursue love, and earnestly desire the spiritual gifts, especially that you may prophesy. 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.
For follow-up discussion and general commentary on the topic. Comments are sorted chronologically.