Can you say that there is no relation between a man’s position in the realm of doctrine and his principles of life and conduct? No; they are one because they concern truth and the sanctity of truth. Truth is one, and it is a moral and psychological impossibility for a man’s belief with respect to what constitutes Christianity to be heterodox and his beliefs with respect to what constitutes the norm of Christian life to be orthodox (John Murray, Collected Writings, 195).