Nothing happens unless something moves.

A new idea comes suddenly and in a rather intuitive way, but intuition is nothing but the outcome of earlier intellectual experience.

I made one great mistake in my life-when I signed the letter to President Roosevelt recommending that atom bombs be made but there was some justification-the danger that the Germans would make them.

Fraulein Noether was the most significant creative mathematical genius thus far produced since the higher education of women began.

Great spirits often meet violent oppisition with mediocre minds.

As to science, we may well define it for our purpose as "methodical thinking directed toward finding regulative connections between our sensual experiences".

Relativity applies to physics, not ethics.