This book was forbidden by the Nazi government, as it outlines a defense against the charges brought forth against Catholicism. It is a piece of Catholic reform theology that articulated a new understanding of what it means to be church. The reprinted edition features an introduction by Ulrich L. Lehner.

Paul Simon (1882-1946) was professor of scholastic philosophy and apologetics in the department of Catholic theology at the University of Tubingen (1925-33). In 1933, he was appointed Cathedral Vicar in Paderborn. He was one of Germanys most distinguished theologians, as well as a proponent...