I don't believe that, but Nietzsche did. In the same passage he says, "It is unworthy of a philosopher to say 'the good and the beautiful are one'; if he has the audacity to add 'so is the truth', he should be soundly beaten" (Schlechta 3:832). Notice you only get the actual beating if you add truth.
Why are theologians today - quick to laud goodness or beauty (especially beauty) - still so afraid of Nietzsche? He's dead. He can't even swing.