Full Idea
You had to become your own master, and also the master of your own virtues. Previously, your virtues were your master; but they must be nothing more than your tools.
Gist of Idea
You are mastered by your own virtues, but you must master them, and turn them into tools
Source
Friedrich Nietzsche (Human, All Too Human [1878], 006)
Book Reference
Nietzsche,Friedrich: 'Human, All Too Human', ed/tr. Faber,Marion [Penguin 1994], p.9
A Reaction
What on earth would Aristotle make of that? Nietzsche offers a sort of metatheory for virtues. I take this to be a form of particularism - that you live by your virtues, but occasionally you can discard a virtue if it seems right. Lie, steal...