No greater mistake can be made than to imagine that what has been written latest is always the more correct; that what is written later on is an improvement on what was written previously; and that every change means progress. Men who think and have correct judgment, and people who treat their subject earnestly, are all exceptions only. Vermin is the rule everywhere in the world: it is always at hand and busily engaged in trying to improve in its own way upon the mature deliberations of the thinkers.

There are, first of all, two kinds of authors: those who write for the subject's sake, and those who write for writing's sake. The first kind have had thoughts…

A book can never be anything more than the impression of its author's thoughts. The value of these thoughts lies either in the matter about which he has though…

Es gibt nur eine Heilkraft, und das ist die Natur; in Salben und Pillen steckt keine. Hochstens konnen sie der Heilkraft der Natur einen Wink geben, wo etwas f…

Perfectibility is one of the most unequivocal characteristics of the human species.

The greatest minds are capable of the greatest vices as well as of the greatest virtues.

Let us say in passing that since (philosophical) remedies are often worse than the malady, our age, in order to be cured of the Plato sickness, has swallowed s…