Our death is not an end if we can live on in our children and the younger generation. For they are us, our bodies are only wilted leaves on the tree of life.

Imagination is everything. It is the preview of life's coming attractions.

Logic will get you from A to B. Imagination will take you everywhere.

Do you believe in immortality? No, and one life is enough for me.

I believe you should live each day as if it is your last, which is why I don't have any clean laundry, because, come on, who wants to wash clothes on the last day of their life?

If I had my life to live over again, I'd be a plumber.

Life is like riding a bicycle. To keep your balance you must keep moving.

How strange is the lot of us mortals! Each of us is here for a brief sojourn; for what purpose he knows not, though he senses it. But without deeper reflection one knows from daily life that one exists for other people.

If you want to live a happy life, tie it to a goal, not to people or things.

Everyone who is seriously involved in the pursuit of science becomes convinced that a spirit is manifest in the laws of the Universe – a spirit vastly superior to that of man…