But there is nothing in biology yet found that indicates the inevitability of death.

No man is rich who is unsatisfied, but who wants nothing possess his heart's desire.

If we will only allow that, as we progress, we remain unsure, we will leave opportunities for alternatives.

The unanswerable mysteries... the attitude that all is uncertain... to summarize it - the humility of the intellect.

It turns out that all life is interconnected with all other life.

I don't believe I can really do without teaching.

I wonder why. I wonder why. I wonder why I wonder.