Full Idea
I deny absolute morality because I do not know an absolute goal of mankind.
Gist of Idea
For absolute morality a goal for mankind is needed
Source
Friedrich Nietzsche (Unpublished Notebooks 1881-82 [1882], 11[037])
A Reaction
Christianity dreams of union of souls with God (clustering around God like goldfish to food, according to Dante). That is an absolute goal, justifying an absolute morality. If Aristotelians could identify human nature, its flourishing might be absolute.
Book Reference
Nietzsche,Friedrich: 'The Joyful Science, and 1881-82 fragments (v 6)', ed/tr. Del Caro,Adrian [Stanford 2023], p.317