I was at the foot of my class.

I find my greatest pleasure, and so my reward, in the work that precedes what the world calls success.

I cannot believe in the immortality of the soul. No, all this talk of an existence for us, as individuals, beyond the grave is wrong. It is born of our tenacity of life - our desire to go on living - our dread of coming to an end.

Interest is the invention of Satan.

To do much clear thinking a person must arrange for regular periods of solitude when they can concentrate and indulge the imagination without distraction.

I'd put my money on the sun and solar energy. What a source of power! I hope we don't have to wait until oil and coal run out before we tackle that.

Five percent of the people think; ten percent of the people think they think; and the other eighty-five percent would rather die than think.