As a rational human being who also believes in God, I know my life is not mine in the religious sense, because I know that one day this bodily form of mine will die, and my soul will reside neither in, nor on, nor around this earth. I am a visitor in this world and I belong to my Creator. He can take me when and how He sees fit. What I choose to do with this temporary life is the test, so in that regard, I need to try to be at the top of my game. I will (and do) surely falter. Often.