C.S. Lewis on Original Sin

"This [first] 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'. A man starts a new job with a sense of vocation and perhaps, for the first week still keeps the discharge of the vocation as his end, taking the pleasures and pains from God's hand, as they come, as 'accidents'. But in the second week he is beginning to 'know the ropes': by the third, he has quarried out of the total job his own plan for himself within that job, and when he can pursue this he feels that he is getting no more than his rights, and, when he cannot, that he is being interfered with. A lover, in obedience to a quite uncalculating impulse, which may be full of good will as well as of desire and need not be forgetful of God, embraces his beloved, and then, quite innocently, experiences a thrill of sexual pleasure; but the second embrace may have that pleasure in view, may be a means to an end, may be the first downward step towards the state of regarding a fellow creature as a thing, as a machine to be used for his pleasure. Thus the bloom of innocence, the element of obedience and the readiness to take what comes is rubbed off every activity. Thoughts undertaken for God's sake - like that on which we are engaged at the moment - are continued as if they were an end in themselves, and then as if our pleasure in thinking were the end, and finally as if our pride or celebrity were the end. Thus all day long, and all the days of our life, we are sliding, slipping, falling away - as if God were, to our present consciousness, a smooth inclined plane on which there is no resting. And indeed we are now of such a nature that we must slip off, and the sin, because it is unavoidable, may be venial [excusable]." (The Problem of Pain, "The Fall of Man," pp.63-64)