Jewish theologian who said, ‘An animal’s eye have the energy to speak an excellent language.’ He was linked to Karl Marx. He was influenced to study beliefs after reading Immanuel Kant, Soren Kierkegaard, and Friedrich Nietzsche, which resulted in his personal problems with Jewish spiritual traditions. He became famous for his research in spiritual existentialism, specially the beliefs of dialogue and began translating the Hebrew Bible into German in 1925. He fulfilled his long term wife Paula Winkler in 1899. The few was collectively until her loss of life in 1958. He stepped down from his placement as honorary teacher at the University or college of Frankfurt am Primary when Adolf Hitler arrived to power.