Logic, too, also rests on assumptions that do not correspond to anything in the real world, e.g., on the assumption that there areequal things, that the same thing is identical at different points in time: but this science arose as a result of the opposite belief (that such things actually exist in the real world). And it is the same with mathematics, which would certainly never have arisen if it had been understood from the beginning that there is no such thing in nature as a perfectly straight line, a true circle, and absolute measure.

What is new, however, is always evil, being that which wants to conquer and overthrow the old boundary markers and the old pieties; and only what is old is good. The good men are in all ages those who dig the old thoughts, digging deep and getting them to bear fruit - the farmers of the spirit. But eventually all land is depleted, and the ploughshare of evil must come again and again.

The coward does not know what it means to be alone: an enemy is always standing behind his chair.

Some are made modest by great praise, others insolent.

All great artists and thinkers are great workers.

As much as possible, and this as quickly as possible: that is what the great mental and emotional illness craves that is variously called "present" or "culture," but that is actually a symptom of consumption.

A thought, even a possibility, can shatter and transform us.