Psychoanalyst, a close friend of Nietzsche, remained a celebrated correspondence with Rainer Maria Rilke, Sigmund Freud and Viktor Tausk, and was the spiritual companion of different artists and writers of the late nineteenth and early twentieth century. Among other highlights of his work: Im Kampf um Gott (Fighting for God, 1885), F. Nietzsche in seinen Werken (F. Nietzsche in his works, 1894), Im Zwischenland (In middle ground, 1902), rodinka (rodinka, 1923) and Lebensrückblick (vital Retrospective, 1951), along with all their correspondence with Freud and Nietzsche ..