I was standing in the living room praying. All of a sudden I began to groan, and was crying. The Holy Spirit began praying in me. When I stopped, I just began to speak and out came a mystery about God that I never knew or heard before. I checked it by God's help and saw that it lines up with the word of God. What is difficult though is I can't tell it. I wondered and found that it is only for certain people to know. I had never had this that I know of but have spoke in other lanquages. I spoke to a man who was a Arab once and he was crying because he said he knew what I was saying to him. I never even knew what I was doing I don't know any Arabic. That man heard me tell about God I found that out later. I have seen several people saved from dying because I prayed in tongues. Tremendous testimonies.
1Co 14:2 For he that speaketh in an unknown tongue speaketh not unto men, but unto God: for no man understandeth him; howbeit in the spirit he speaketh mysteries.