Christians (ONLY, please), do you all understand what the Baptism of the Holy Ghost is about?

Thank you. Very informative. When I was a young teenager, I attended church with my Grandfather and my cousin. He was a very quiet man. He started speaking in tongues and another person in the church stood up and started translating. They had known each other for years and here they are screaming and yelling and scaring the heck out of me! I didn't understand why then, but the translator kept calling my Grandfather a "Demon", and I was very angry at that. It turned out that years later I would come to know that the translator knew his true heart, which was black and cold. So I truly believe that he was taken over by a demonic force. I've never again witnessed such a sight and never want to. It does not lessen my belief in Almighty God, nor does it affirm it. Affirmation in a factual knowledge and belief of our God is only moot anyway. God Bless.