This article explores the fundamental role of uncertainty and doubt in both medical practice and religious inquiry, arguing that epistemic humility constitutes not a deficiency but a defining virtue of mature engagement with both disciplines. Drawing upon phenomenological philosophy, Talmudic hermeneutics, apophatic theology, and contemporary philosophy of medicine, we demonstrate that the recognition of irreducible uncertainty creates sacred space at the boundaries of knowledge—space essential for genuine healing and authentic theological encounter. The parallel structures of clinical reasoning and theological inquiry reveal that both domains require practitioners who can dwell productively in ambiguity, resist premature closure, and honor the mystery that remains after all our best efforts at understanding. We propose that cultivating comfort with uncertainty represents the highest form of professional and spiritual development in both medicine and religion.