William Hurt said this; I completely concur:

"The simple fact of existence, of being aware that you are aware; this to me is the most astounding fact. And I think that it has something to do with dying. When you are a kid you are beset by fears and you think, 'I'll solve the fear by living forever and becoming a movie star.' But I am not going to live forever. And the more I know it, the more amazed I am by being here at all. I am so thrilled by the privilege of life, and yet at the same time I know that I have to let it go."