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Mere Christianity - C. S. Lewis [67]

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God at all believes that He knows what you and I are going to do tomorrow. But if He knows I am going to do so-and-so, how can I be free to do otherwise? Well, here once again, the difficulty comes from thinking that God is progressing along the Time-line like us: the only difference being that He can see ahead and we cannot. Well, if that were true, if God foresaw our acts, it would be very hard to understand how we could be free not to do them. But suppose God is outside and above the Time-line. In that case, what we call ‘tomorrow’ is visible to Him in just the same way as what we call ‘today’. All the days are ‘Now’ for Him. He does not remember you doing things yesterday; He simply sees you doing them, because, though you have lost yesterday, He has not. He does not ‘foresee’ you doing things tomorrow; He simply sees you doing them: because, though tomorrow is not yet there for you, it is for Him. You never supposed that your actions at this moment were any less free because God knows what you are doing. Well, He knows your tomorrow’s actions in just the same way—because He is already in tomorrow and can simply watch you. In a sense, He does not know your action till you have done it: but then the moment at which you have done it is already ‘Now’ for Him.

This idea has helped me a good deal. If it does not help you, leave it alone. It is a ‘Christian idea’ in the sense that great and wise Christians have held it and there is nothing in it contrary to Christianity. But it is not in the Bible or any of the creeds. You can be a perfectly good Christian without accepting it, or indeed without thinking of the matter at all.

4


GOOD INFECTION

I begin this chapter by asking you to get a certain picture clear in your minds. Imagine two books lying on a table one on top of the other. Obviously the bottom book is keeping the other one up—supporting it. It is because of the underneath book that the top one is resting, say, two inches from the surface of the table instead of touching the table. Let us call the underneath book A and the top one B. The position of A is causing the position of B. That is clear? Now let us imagine—it could not really happen, of course, but it will do for an illustration—let us imagine that both books have been in that position for ever and ever. In that case B’s position would always have been resulting from A’s position. But all the same, A’s position would not have existed before B’s position. In other words the result does not come after the cause. Of course, results usually do: you eat the cucumber first and have the indigestion afterwards. But it is not so with all causes and results. You will see in a moment why I think this important.

I said a few pages back that God is a Being which contains three Persons while remaining one Being, just as a cube contains six squares while remaining one body. But as soon as I begin trying to explain how these Persons are connected I have to use words which make it sound as if one of them was there before the others. The First Person is called the Father and the Second the Son. We say that the First begets or produces the second; we call it begetting, not making, because what He produces is of the same kind as Himself. In that way the word Father is the only word to use. But unfortunately it suggests that He is there first—just as a human father exists before his son. But that is not so. There is no before and after about it. And that is why I think it important to make clear how one thing can be the source, or cause, or origin, of another without being there before it. The Son exists because the Father exists: but there never was a time before the Father produced the Son.

Perhaps the best way to think of it is this. I asked you just now to imagine those two books, and probably most of you did. That is, you made an act of imagination and as a result you had a mental picture. Quite obviously your act of imagining was the cause and the mental picture the result. But that does not mean that you first did the imagining and then got the picture. The moment

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