the most powerful prayer is to believe in who you are, "ye are GODs, but you die like men". It reveals who you are, that you are not man but GOD. That was the secret of Jesus, He believed in who He was, GOD, therefore, all His prayers were the answer, and He said, "he that believes in Me shall do the same works". Yes, prayer is the key in your hand, it's IMPORTANT for opening whatever you desire