The Quaker spiritual tradition integrates mystical insight with prophetic witness. Michael Birkel tells the story of the movement's origins, describes how the distinctive Quaker practice of group worship in silence developed, and explains how collective discernment is used in decision-making. He explores the historical development of the testimonies, the ethical stands taken by Quakers for peace, justice, equality, integrity, and simplicity, and he reflects on the contemporary relevance and meaning of a Christian tradition with a strong contemplative and activist dimension. This book is part of the Traditions of Christian Spirituality Series from Orbis Books.