"I approach the presentation of Kierkegaard with some trepidation. Next to Nietzsche, or rather, prior to Nietzsche, I consider him to be the most important thinker of our post-Kantian age. With Goethe and Hegel, an epoch had reached its conclusion, and our prevalent way of thinking — that is, the positivistic, natural-scientific one — cannot really be considered as philosophy."