When he attended Rochester Theological Seminary, his early teachings were challenged. He learned of higher criticism, which led him to comment later that his "inherited ideas about the inerrancy of the Bible became untenable." He also began to doubt the substitutionary atonement; in his words, "it was not taught by Jesus; it makes salvation dependent upon a trinitarian transaction that is remote from human experience; and it implies a concept of divine justice that is repugnant to human sensitivity." But rather than shaking his faith, these challenges reinforced it.