I'm not that tough; I'm not that smart. I need life telling me who I am, showing me my mind constantly. I wouldn't see it in a cave.
And I think that when I finally decided to let go and let God and allow that to happen, I became a lot more successful than I could have done if I had planned it all myself.
You have to stay in shape. My grandmother, she started walking five miles a day when she was 60. She's 97 today and we don't know where the hell she is.