Below are salient passages from C. S. Lewis’ chapter, “The Fall of Man,” in The Problem of Pain (1940).
On the sole function of the doctrine of the Fall:
Man is now a horror to God and to himself and a creature ill-adapted to the universe not because God made him so but because he has made himself so by the abuse of his free will. To my mind this is the sole function of the doctrine. It exists to guard against two sub-Christian theories of the origin of evil – Monism, according to which God Himself, being “above good and evil”, produces impartially the effects to which we give those two names, and Dualism, according to which God produces good, while some equal and independent Power produces evil. Against both these views Christianity asserts that God is good; that He made all things good and for the sake of their goodness; that one of the good things He made, namely, the free will of rational creatures, by its very nature included the possibility of evil; and that creatures, availing themselves of this possibility, have become evil.
On hypothetical scenarios after the Fall:
It would, no doubt, have been possible for God to remove by miracle the results of the first sin ever committed by a human being; but this would not have been much good unless He was prepared to remove the results of the second sin, and of the third, and so on forever. If the miracles ceased, then sooner or later we might have reached our present lamentable situation: if they did not, then a world, thus continually underpropped and corrected by Divine interference, would have been a world in which nothing important ever depended on human choice, and in which choice itself would soon cease from the certainty that one of the apparent alternatives before you would lead to no results and was therefore not really an alternative.
On the first sin of humankind:
This sin has been described by Saint Augustine as the result of Pride, of the movement whereby a creature (that is, an essentially dependent being whose principle of existence lies not in itself but in another) tries to set up on its own, to exist for itself. Such a sin requires no complex social conditions, no extended experience, no great intellectual development. From the moment a creature becomes aware of God as God and of itself as self, the terrible alternative of choosing God or self for the centre is opened to it. This sin is committed daily by young children and ignorant peasants as well as by sophisticated persons, by solitaries no less than by those who live in society: it is the fall in every individual life, and in each day of each individual life, the basic sin behind all particular sins: at this very moment you and I are either committing it, or about to commit it, or repenting it. We try, when we wake, to lay the new day at God’s feet; before we have finished shaving, it becomes our day and God’s share in it is felt as a tribute which we must pay out of “our own” pocket, a deduction from the time which ought, we feel, to be “our own.”
On the development of the Paradisal man, proof that Lewis held to evolutionary creation:
For long centuries God perfected the animal form which was to become the vehicle of humanity and the image of Himself. He gave it hands whose thumb could be applied to each. of the fingers, and jaws and teeth and throat capable of articulation, and a brain sufficiently complex to execute all the material motions whereby rational thought is incarnated. The creature may have existed for ages in this state before it became man: it may even have been clever enough to make things which a modern archaeologist would accept as proof of its humanity. But it was only an animal because all its physical and psychical processes were directed to purely material and natural ends. Then, in the fullness of time, God caused to descend upon this organism, both on its psychology and physiology, a new kind of consciousness which could say “I” and “me”, which could look upon itself as an object, which knew God, which could make judgements of truth, beauty, and goodness, and which was so far above time that it could perceive time flowing past. This new consciousness ruled and illuminated the whole organism, flooding every part of it with light, and was not, like ours, limited to a selection of the movements going on in one part of the organism; namely the brain. Man was then all consciousness. . . . For man was made to be the priest and even, in one sense, the Christ, of the animals – the mediator through whom they apprehend so much of the Divine splendour as their irrational nature allows. And God was to such a man no slippery, inclined plane. The new consciousness had been made to repose on its Creator, and repose it did. However rich and varied man’s experience of his fellows (or fellow) in charity and friendship and sexual love, or of the beasts, or of the surrounding world then first recognised as beautiful and awful, God came first in his love and in his thought, and that without painful effort. In perfect cyclic movement, being, power and joy descended from God to man in the form of gift and returned from man to God in the form of obedient love and ecstatic adoration: and in this sense, though not in all, man was then truly the son of God, the prototype of Christ, perfectly enacting in joy and ease of all the faculties and all the senses that filial self surrender which Our Lord enacted in the agonies of the crucifixion.
On how Paradisal man fell into sin:
We do not know how many of these creatures God made, nor how long they continued in the Paradisal state. But sooner or later they fell. Someone or something whispered that they could become as gods – that they could cease directing their lives to their Creator and taking all their delights as uncovenanted mercies, as “accidents” (in the logical sense) which arose in the course of a life directed not to those delights but to the adoration of God. As a young man wants a regular allowance from his father which he can count on as his own, within which he makes his own plans (and rightly, for his father is after all a fellow creature) so they desired to be on their own, to take care for their own future, to plan for pleasure and for security, to have a meum from which, no doubt, they would pay some reasonable tribute to God in the way of time, attention, and love, but which nevertheless, was theirs not His. They wanted, as we say, to “call their souls their own”. But that means to live a lie, for our souls are not, in fact, our own. They wanted some corner in the universe of which they could say to God, “This is our business, not yours.” But there is no such corner. They wanted to be nouns, but they were, and eternally must be, mere adjectives. We have no idea in what particular act, or series of acts, the self contradictory, impossible wish found expression. For all I can see, it might have concerned the literal eating of a fruit, but the question is of no consequence. This act of self will on the part of the creature, which constitutes an utter falseness to its true creaturely position, is the only sin that can be conceived as the Fall.
On whether the Fall was providential or accidental:
God might have arrested this process by miracle: – but this – to speak in somewhat irreverent metaphor would have been to decline the problem which God had set Himself when He created the world, the problem of expressing His goodness through the total drama of a world containing free agents, in spite of, and by means of, their rebellion against Him. The symbol of a drama, a symphony, or a dance, is here useful to correct a certain absurdity which may arise if we talk too much of God planning and creating the world process for good and of that good being frustrated by the free will of the creatures. This may raise the ridiculous idea that the Fall took God by surprise and upset His plan, or else – more ridiculously still – that God planned the whole thing for conditions which, He well knew, were never going to be realised. In fact, of course, God saw the crucifixion in the act of creating the first nebula. The world is a dance in which good, descending from God, is disturbed by evil arising from the creatures, and the resulting conflict is resolved by God’s own assumption of the suffering nature which evil produces.