C. S. Lewis and the Forgiveness of Sins (1958)

On April 15, 1958, C. S. Lewis wrote to his American correspondent, Mary Shelburne, offering a rare glimpse into the inner life of faith. From his home in Oxford, he admitted with disarming honesty: “I had been a Christian for many years before I really believed in the forgiveness of sins, or more strictly, before my theoretical belief became a reality to me.” The statement does not weaken Christian doctrine; it highlights how easily a believer may hold truth in the mind while still resisting it in the conscience.

Lewis’s letter is a small act of moral heroism. It takes courage to confess that one’s struggle is not with the gospel’s clarity but with the heart’s refusal to be comforted. Many can argue for grace while secretly living as though Christ’s pardon were for everyone else. Lewis chose humility over image, and in doing so he served Shelburne—and countless later readers—by normalizing honest repentance and genuine spiritual growth.

Scripture speaks directly to the very gap Lewis describes. “If we confess our sins, He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness” (1 John 1:9). Forgiveness is not merely an idea to be admired; it is a cleansing to be received. Likewise, “There is now no condemnation for those who are in Christ Jesus” (Romans 8:1). When condemnation lingers after confession, the issue is often not God’s unwillingness to pardon but our unwillingness to rest.

Mary Shelburne and Pastoral Correspondence

Mary Shelburne was among the American friends who wrote Lewis for counsel. Their correspondence shows how Christian discipleship often occurs through ordinary means: letters, listening, prayerful words, and steady encouragement. Lewis did not answer as a distant celebrity, but as a fellow sinner pointing to a sufficient Savior.

Faith Becoming Trusted Grace

Lewis’s remark presses believers toward a mature, courageous faith—one that brings guilt into the light and leaves it there. The cross is not only the proof that forgiveness is possible; it is God’s declaration that forgiveness is accomplished. “He Himself bore our sins in His body on the tree” (1 Peter 2:24). Where confession meets Christ, mercy becomes not merely true, but trusted.