1. Nietzsche Friedrich, The birth of tragedy and The case of Wagner, transl. by Kaufmann Walter (New York, 1967), 18.
2. Nietzsche Friedrich, Beyond good and evil, transl. by Kaufmann Walter (New York, 1966), 21–22.
3. Nietzsche Friedrich, The will to power, transl. by Kaufmann Walter, Hollingdale R. J., ed. by Kaufmann Walter (New York, 1968), 339.
4. Nietzsche Friedrich, The gay science, transl. by Kaufmann Walter (New York, 1974), 266.