Beyond Good and Evil by Friedrich Nietzsche Chapter 2 Page 33

self-regulation, assimilation, nutrition, secretion, and change of matter, are still synthetically united with one another — as a PRIMARY FORM of life? — In the end, it is not only permitted to make this attempt, it is commanded by the conscience of LOGICAL METHOD.

Not to assume several kinds of causality, so long as the attempt to get along with a single one has not been pushed to its furthest extent (to absurdity, if I may be allowed to say so): that is a morality of method which one may not repudiate nowadays — it follows “from its definition,” as mathematicians say. The question is ultimately whether we really recognize the will as OPERATING, whether we believe in the causality of the will; if we do so — and fundamentally our belief IN THIS is just our belief in causality