I have always loved solitude, a trait which tends to increase with age.

Philosophers play with the word, like a child with a doll.... It does not mean that everything in life is relative.

Intuitive powers played a central role in my scientific work, not wild speculation, yet a valued resource when no other approach was available.

Time is what the clock says.

It followed from the special theory of relativity that mass and energy are both but different manifestations of the same thing - a somewhat unfamiliar conception for the average mind. Furthermore, the equation E = mc², in which energy is put equal to mass, multiplied by the square of the velocity of light, showed that very small amounts of mass may be converted into a very large amount of energy and vice versa.

It's not that I'm so smart, it's just that I stay with problems longer.

I received your letter of June 10th. I have never talked to a Jesuit priest in my life and I am astonished by the audacity to tell such lies about me. From the viewpoint of a Jesuit priest I am, of course, and have always been an atheist.