p.p.s. Fyi, it's my opinion that Nietzsche's perspectivism was not Nietzsche's sole opinion on the matter.
More than anything, he wanted to throw down the gauntlet, and thus provide a challenge.
He knew the stakes (relativism and nihilism), and he wanted to challenge the philosophers of the future to take up that challenge, and hopefully bring into existence a new thinking to combat a weak and pathetic relativism and nihilism.
It's even more complicated than that, but, just so you know, that's a leading off point for my opinion's on those quotes by Nietzsche.