Basic characteristics of an individual organism: to divide, to unite, to merge into the universal, to abide in the particular, to transform itself, to define itself, and as living things tend to appear under a thousand conditions, to arise and vanish, to solidify and melt, to freeze and flow, to expand and contract. Since these effects occur together, any or all may occur at the same moment.

No wonder we are all more or less pleased with mediocrity, since it leaves us at rest, and gives the same comfortable feeling as when one associates with his equals.

Energy is the basis of everything. Every Jew, no matter how insignificant, is engaged in some decisive and immediate pursuit of a goal... It is the most perpetual people of the earth.

We are forced to participate in the games of life before we can possibly learn how to use the options in the rules governing them.

Man knows himself only insofar as he knows the world, becoming aware of it if only within himself, and of himself self only within it. Each new subject, well observed, opens up within us a new organ of thought.

All men would be masters of others, and no man is lord of himself.

A stated truth loses its grace, but a repeated error appears insipid and ridiculous.