"The Atonement may be regarded as the central doctrine of Christianity, the very raison d'être of the Christian faith. Take this away, and there would remain indeed a faith and a morality, but both would have lost their distinctive features: it would be a faith without its centre, and a morality without its foundation. Christianity would be unrecognisable without its angry God, its dying Saviour, its covenant signed with "the blood of the Lamb". The blotting out of the Atonement would deprive millions of all hope towards God, and would cast them from satisfaction into anxiety from comfort into despair. The warmest feelings of Christendom cluster round the Crucifix, and he, the crucified one, is adored with passionate devotion, not as martyr for truth, not as witness for God, not as faithful to death, but as the substitute for his worshippers, as he who bears in their stead the wrath of God, and the punishment due to sin. The Christian is taught to see in the bleeding Christ the victim slain in his own place; he himself should be hanging on that cross, agonised and dying; those nail-pierced hands ought to be his; the anguish on that face should be furrowed on his own the weight of suffering resting on that bowed head should be crushing himself into the dust. In the simplest meaning of the words, Christ is the sinner's substitute, and on him the sin of the world is laid."
January 1, 1970
https://en.wikiquote.org/wiki/Atonement