"How can we be sure?", say the doubters - "who are WE" [they opine] to judge?

This is how they lisp out their whining nihilistic nagging which they pretend is a kind of 'philosophy' - fools!

Luckily, Nietzsche gives us much guidance. For example, he gives us a training exercise which is based on two activities;

1) To both commit and endure atrocities, and
2) To both commit and endure baseness.