Anyone seeking to reform the Church must share the Church's faith

"Anyone seeking to reform the Church must share the Church's faith and accept the essentials of her mission. The Church cannot take seriously the reform advocated by those who deny that Christ was Son of God and Redeemer, who assert that the Scriptures teach error, or who hold that the Church should not require orthodoxy on the part of her members. Proposals coming from a perspective alien to the Christian faith should be treated with the utmost suspicion if not dismissed as unworthy of consideration."

Avery Cardinal Dulles, S.J., Church and society: the Laurence J. McGinley Lectures: 1988-2007 (New York, NY: Fordham University Press, 2008), 404-405, as quoted by James F. Keating in his review, The Thomist 72, no. 4 (October 2008): 663-664.