He earned a Ph.D. in Pastoral Theology from the University of Münster in Germany and served as a professor at Sogang University and Gwangju Catholic University, as well as Deputy Secretary-General of the Catholic Bishops’ Conference of Korea. As a Catholic priest and the spiritual successor to Father Kim Dae-geon, the author offers deep insights into the heroic life and hidden anguish of Korea’s first martyr, while portraying Father Kim Dae-geon as a “young man in his twenties” who struggled with deep inner turmoil.