The decision must be made between Judaism and Christianity, between business and culture, between male and female, between the race and the individual, between unworhtiness and worth, between the earthly and the higher life, between negation and God-like. Mankind has the choice to make. There are only two poles, and there is no middle way.

There 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.

Talent is hereditary; it may be the common possession of a whole family (eg, the Bach family); genius is not transmitted; it is never diffused, but is strictly individual.

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. . . .

Logic and ethics are fundamentally the same, they are no more than duty to oneself

In those rare individual cases where women approach genius they also approach masculinity.

Among the notable things about fire is that it also requires oxygen to burn - exactly like its enemy, life. Thereby are life and flames so often compared.