I do not disbelieve that in some mysterious transcendental sense, as involved in the system of the entire universe, with so vast an arc that no faculty of man can apprehend its curve, that in some such sense the Catholic doctrine of the atonement may be true. But a doctrine out of which, with our reason, our feeling, our logic, I at least can gather any practical instruction for mankind — any deeper appreciation of the attributes of God, any deeper love for Him, any stimulant towards our own obedience — such a doctrine I cannot find it. I bury what I am to think of it in the deepest corner of my own heart, where myself I fear to look.

Letter X - The Nemesis of Faith (1849)