We're on this planet for the briefest of moments in cosmic terms, and I want to spend that time thinking about what I consider the deepest questions.

I don't consider myself enigmatic, but I don't spend a lot of time thinking about my public persona.

Physics grapples with the largest questions the universe presents. 'Where did the totality of reality come from?' 'Did time have a beginning?'

Sometimes attaining the deepest familiarity with a question is our best substitute for actually having the answer.

I don't spend a lot of time thinking about myself.

I don't spend much time thinking about whether God exists. I don't consider that a relevant question. It's unanswerable and irrelevant to my life, so I put it in the category of things I can't worry about.