Yes, I agree. We should definitely live our lives to the fullest because we only live once. I think that passivity is a sign that we don't enjoy the things we are doing, it's a sign that we should notice and think deeply about. An example of this is when I am writing, I don't ever feel tired of wiring but I get tired of studying up on a subject I have no interest in. Great read!
RE: Passivity and obstacle to success.