Audiobook 400 Quotes of Modern Philosophy: Nietzsche, Kant, Kierkegaard & Schopenhauer. Become familiar with the most important modern philosophers, Friedrich Nietzsche, Emmanuel Kant, Soren Kierkegaard and Arthur Schopenhauer. These four figures have shaped the entirety of Western philosophy; delve deep into their works and thoughts with a selection of the essential quotes introducing their major ideas and delineating the structure of their work with clarity.