The conservatism of a religion - it's orthodoxy - is the inert coagulum of a once highly reactive sap.

When cowardice is made respectable, its followers are without number both from among the weak and the strong; it easily becomes a fashion.

Freedom means freedom from forces and circumstances which would turn man into a thing, which would impose on man the passivity and predictability of matter. By this test, absolute power is the manifestation most inimical to human uniqueness. Absolute power wants to turn people into malleable clay.

Nature is a self-made machine, more perfectly automated than any automated machine. To create something in the image of nature is to create a machine, and it was by learning the inner working of nature that man became a builder of machines.

Our achievements speak for themselves. What we have to keep track of are our failures, discouragements and doubts.

There is no loneliness greater than the loneliness of a failure. The failure is a stranger in his own house.

Man was nature's mistake she neglected to finish him and she has never ceased paying for her mistake.