The less a man knows about the past and the present, the more insecure must prove to be his judgment of the future.

Every man takes the limits of his own vision for the limits of the world.

Men are able to assist fortune but not to thwart her. They can weave her designs, but they cannot destroy them.

All progress is based upon a universal, innate desire on the part of every organism to live beyond its income.

The future comes like an unwelcome guest.