Progress is not accomplished in one stage.

Loving is almost a substitute for thinking. Love is a burning forgetfulness of all other things. How shall we ask passion to be logical?

Mankind is not a circle with a single center but an ellipse with two focal points of which facts are one and ideas the other.

Dying is nothing. What's terrible is not to live.

All the human and animal manure which the world wastes, if returned to the land, instead of being thrown into the sea, would suffice to nourish the world.

To die is nothing; but it is terrible not to live.

Human society, the world, and the whole of mankind is to be found in the alphabet.