BGE 2

Nietzsche rails against what he sees as the "fundamental faith of the metaphysicians" - "the faith in opposite values." Nietzsche accuses past philosophers of not doubting enough. The opposite values they see may just be from their perspective. These further doubts and suggestive possibilities he calls the dangerous "maybe," which he claims requires the "advent of a new species of philosophers."

BGE 1

Nietzsche questions the "will to truth" and the value of truth - "Why not rather untruth?" He finishes with cautionary remarks about the risk of such a question.

BGE Preface

All previous philosophy has failed. The dogmatist's error, which is Plato's invention of "the pure spirit and the good as such," is considered by Nietzsche as "the worst, most durable, and most dangerous of all errors so far." Yet, Nietzsche is grateful for it since the struggle against it has built up strength and drawn back the bow which can now be aimed and shot into the future.