With the goal of reaching a broad audience, Machen masterfully navigates complex theological concepts, making them both accessible and compelling to a wide range of listeners. Things Unseen is a powerful and engaging collection of talks that will inspire readers to think deeply about the Christian faith and to share it with others. In the rich tradition of C.S. Lewis's Mere Christianity, J. Gresham Machen pioneered a groundbreaking radio ministry in 1935, broadcasting Reformed theology to the masses from a Philadelphia studio. Introduced by Timothy J. Keller, with a foreword by Sinclair B. Ferguson, a historical preface by Stephen J. Nichols, and an afterword by Richard B. Gaffin, Jr., Things Unseen is a masterful blend of systematic theology and evangelistic apologetics. Through a series of crystal-clear addresses, Machen unfolds the essentials of Christianity, skillfully navigating complex theological ideas to make them both accessible and captivating to a broad audience. This powerful collection of talks is sure to inspire readers to delve deeper into the Christian faith and to share its transformative power with others.