I want to be an actor because it has been my dream since childhood. When I was a child my sister and I staged performances every summer. This is the only thing that I want to do in my life. I truly feel that I was born for it. It is my passion, my aim, I (do) devote my life to it and living it. really good, you don't need the "do" but if you leave it in it emphasizes the "devote"