Full Idea
For philosophers, the higher must not be allowed to grow out of the lower, must not be allowed to have grown at all ...Moral: everything of the first rank must be causa sui. Origin in something else counts as an objection, as casting a doubt on value.
Clarification
'Causa sui' (Latin) means it causes itself
Gist of Idea
Philosophers hate values having an origin, and want values to be self-sufficient
Source
Friedrich Nietzsche (Twilight of the Idols [1889], 2.4)
Book Reference
Nietzsche,Friedrich: 'Twilight of the Idols and The Anti-Christ', ed/tr. Hollingdale,R.J. [Penguin 1972], p.37
A Reaction
This is so deep and central that I wrote a paper on it, advocating that the theory of values should focus of value-makers.