Abraham Joshua Heschel (1907–1972) was a Jewish theologian, philosopher, and civil rights activist, widely regarded as one of the most influential Jewish thinkers of the 20th century. Born in Warsaw, Poland, into a family of Hasidic rabbis, Heschel received traditional religious training and later earned a doctorate in philosophy in Germany. He fled Nazi persecution and immigrated to the United States in 1940. Heschel taught at the Jewish Theological Seminary of America, where he became known for his powerful writings on the nature of God, prayer, and the prophets. His books, such as The Sabbath, Man Is Not Alone, and God in Search of Man, explore the relationship between God and humanity with deep spiritual insight. In addition to his scholarship, Heschel was an outspoken activist. He marched alongside Martin Luther King Jr. during the civil rights movement and opposed the Vietnam War, viewing social justice as a religious obligation. He famously said, “When I marched in Selma, my feet were praying.” Heschel’s legacy continues to inspire interfaith dialogue, spiritual reflection, and the pursuit of justice.