Look deep into nature, and then you will understand everything better.

Everything is energy and that’s all there is to it.

Marvellous, what ideas the young people have these days. But I don't believe a word of it.

I believe serious progress (in the abolition of war) can be achieved only when men become organized on an international scale and refuse, as a body, to enter military or war service.

What the individual can do is to give a fine example, and to have the courage to uphold ethical values .. in a society of cynics.

Ninety nine failed solutions equals a gain of 99 pieces of information.

You can't use an old map to explore a new world.