The money one gets for selling one's soul is always spent in deadening one's conscience, so the net gain at the end of a lifetime is no greater than if the diabolic bargain had not been struck.

The man who doesn’t make up his mind to cultivate the habit of thinking misses the greatest pleasure in life.

We will make electricity so cheap that only the rich will burn candles.

Direct thought is not an attribute of feminity. In this, women are now centuries behind man.

The biggest failure of man is that he gives up before he realizes how close he was to success.

The reason a lot of people do not recognize opportunity is because it usually goes around wearing overalls looking like hard work.

The world owes nothing to any man, but every man owes something to the world.