On quantum theory I use up more brain grease than on relativity.

Nothing will benefit human health and increase chances for survival of life on Earth as much as the evolution to a vegetarian diet.

Once you can accept the universe as matter expanding into nothing that is something, wearing stripes with plaid comes easy.

No, this trick won't work... How on earth are you ever going to explain in terms of chemistry and physics so important a biological phenomenon as first love?

Anyone who is not shocked by quantum theory has not understood it.

What lead me more or less directly to the special theory of relativity was the conviction that the electromotive force acting on a body in motion in a magnetic…

The idealistic tinge in my conception of the physical world arose out of mathematical researches on the relativity theory. In so far as I had any earlier philo…