Full Idea
The popular belief in cause and effect is founded on the presupposition that free will is the cause of every effect: it is only from this that we derive the feeling of causality.
Gist of Idea
We derive the popular belief in cause and effect from our belief that our free will causes things
Source
Friedrich Nietzsche (The Will to Power (notebooks) [1888], §667)
Book Reference
Nietzsche,Friedrich: 'The Will to Power', ed/tr. Kaufmann,W /Hollingdate,R [Vintage 1968], p.352
A Reaction
It may be that our first experiences of causation involve the wil, though I don't see why babies shouldn't also observe. Nietzsche is muddling the epistemology with the ontology.