Thus Spoke Zarathustra is a foundational work of Western literature and is widely considered to be Friedrich Nietzsche's masterpiece. It includes the German philosopher's famous discussion of the phrase 'God is dead' as well as his concept of the Superman. Nietzsche delineates his Will to Power theory and devotes pages to critiquing Christian thinking, in particular Christianity's definition of good and evil. Revised translation with modern American English spelling.