For every successful actor or actress there are countless numbers who don't make it. The name of the game is rejection. You go to an audition and you're told you're too tall or you're too Irish or your nose is not quite right. You're rejected for your education you're rejected for this or that and it's really tough.
A man has made at least a start on discovering the meaning of human life when he plants shade trees under which he knows full well he will never sit.