Así habló Zaratustra

Thus spoke Zarathustra constitutes, as its author expressly states, the culmination of all of Nietzsche's philosophical thought, including his later texts. It is not only that the relevance of certain concepts allows us to speak of Thus Spoke Zarathustra as the beginning of a new era in the philosophy of its author. It is that the meaning of this assessment that Nietzsche makes of his work is crucial to correctly understand its content and avoid the temptation of an exegesis that sees in Zarathustra a simple literary license or a symbolic exposition of what Nietzsche had already said, in a strictly philosophical format, in his previous works.