Heschel is a widely read Jewish theologian whose most influential works include Man Is Not Alone, God in Search of Man, The Sabbath, and The Prophets. At the Vatican Council II, as representative of American Jews, Heschel persuaded the Roman Catholic Church to eliminate or modify passages in its liturgy that demeaned the Jews, or referred to an expected conversion to Christianity. His theological works argued that religious experience is a fundamentally human impulse, not just a Jewish one.