It can scarcely be denied that the supreme goal of all theory is to make the irreducible basic elements as simple and as few as possible without having to surrender the adequate representation of a single datum of experience.

I am the one to whom you wrote in care of the Belgian Academy... Read no newspapers, try to find a few friends who think as you do, read the wonderful writers …

There is not the slightest indication that [nuclear energy] will ever be obtainable. It would mean that the atom would have to be shattered at will.

Falling in love is not at all the most stupid thing that people do - but gravitation cannot be held responsible for it.

The true knowledge or science which exists nowhere but in the mind itself, has no other entity at all besides intelligibility; and therefore whatsoever is clea…

Physics has entered a remarkable era. Ideas that were once the realm of science fiction are now entering our theoretical - and maybe even experimental - grasp.…

One can always find inflationary models to explain whatever phenomenon is represented by the flavour of the month.