Full Idea
I have no idea why the dictatorship and omnipotence of truth would be desirable; it's sufficient for me that it has great power.
Gist of Idea
Why should truth be omnipotent? It is enough that it is very powerful
Source
Friedrich Nietzsche (Dawn (Daybreak) [1881], §507)
Book Reference
Nietzsche,Friedrich: 'Dawn (Daybreak) (v 5)', ed/tr. Smith, Brittain [Stanford 2011], p.251
A Reaction
I once heard a philosopher (at Essex University) assert that truth is the only value, which was interesting. Nietzsche actually wants to endorse the value of lies and deceptions, like the 'noble lie' in Plato's Republic.