This book was originally submitted as a Ph.D. dissertation on the Life and theology of Dietrich Bonhoeffer (1906-1945) in relationship to his theological understanding of "Faith" and "Grace" that analyzes these two concepts throughout his life and writings, academic university lectures, his doctoral dissertations, his focus that led up to his incarceration and death as a prophet, theologian, pastor, and martyr in 1945. This study of Bonhoeffer will seek to examine his life and theology in light of his theological understanding of faith and grace that shaped his thinking and influenced him to become involved in a political conspiracy to abolish Hitler. Bonhoeffer sought social, spiritual, political freedom in Jesus Christ, he preached, wrote, and proclaimed the uncompromising message of discipleship and costly grace. His life and death remain as an abiding legacy to the Christian faith.