When you gaze long into the Abyss of Sustainability, the Abyss of Sustainability also gazes into you.

One does not know - cannot know - the best that is in one.

The body is a big sagacity, a plurality with one sense, a war and a peace, a flock and a shepherd.

The surest sign of the estrangement of the opinions of two persons is when they both say something ironical to each other and neither of them feels the irony.

Whereas the man of action binds his life to reason and its concepts so that he will not be swept away and lost, the scientific investigator builds his hut right next to the tower of science so that he will be able to work on it and to find shelter for himself beneath those bulwarks which presently exist.

Your highest thought, however, ye shall have it commanded unto you by me - and it is this: man is something that is to be surpassed.

Clever people are never credited with their follies: what a deprivation of human rights!