Jesus said in John 8 that "the truth will set you free" ~ I've found this to be true. In my opinion, any religion that does not make you feel free cannot possibly be true. Experiencing freedom in your God proves that he is love and the true One. There are also those who do not believe in God and think that they are free, but this is only pseudo-freedom felt when you think you have escaped from facing God. Such feelings are short-lived when you realize that you are a slave to the world and to your ego.