No one suffers so much as he [the genius] with the people, and, therefore, for the people, with whom he lives. For, in a certain sense, it is certainly only "by suffering" that a man knows. If compassion is not itself clear, abstractly conceivable or visibly symbolic knowledge, it is, at any rate, the strongest impulse for the acquisition of knowledge. It is only by suffering that the genius understands men. And the genius suffers most because he suffers with and in each and all; but he suffers most through his understanding. . . .
Otto WeiningerIt is certainly true that most men need some kind of a God. A few, and they are the men of genius, do not bow to an alien law. The rest try to justify their doings and misdoings, their thinking and existence (at least the menial side of it), to some one else, whether it be the personal God of the Jews, or a beloved, respected, and revered human being. It is only in this way that they can bring their lives under the social law. . . .
Otto WeiningerNo men who really think deeply about women retain a high opinion of them; men either despise women or they have never thought seriously about them.
Otto WeiningerUniversality is the distinguishing mark of genius. There is no such thing as a special genius, a genius for mathematics, or for music, or even for chess, but only a universal genius. The genius is a man who knows everything without having learned it.
Otto WeiningerThere are transitional forms between the metals and non-metals; between chemical combinations and simple mixtures, between animals and plants, between phanerogams and cryptogams, and between mammals and birds [...]. The improbability may henceforth be taken for granted of finding in Nature a sharp cleavage between all that is masculine on the one side and all that is feminine on the other; or that any living being is so simple in this respect that it can be put wholly on one side, or wholly on the other, of the line.
Otto Weininger