C.S Lewis (in his book ‘Mere Christianity’) wrote: “. . . .just the same thing happens about Christianity. I am not asking anyone to accept Christianity if his best reasoning tells him that the weight of the evidence is against it.That is not the point at which Faith comes in. But supposing a man’s reason once decides that the weight of the evidence is for it. I can tell that man what is going to happen to him in the next few weeks. There will come a moment when there is bad news, or he is in trouble or is living among a lot of other people who do not believe it, and all at once his emotions will rise up and carry out a sort of blitz on his belief. Or else there will come a moment when he wants a woman, or wants to tell a lie, or feels very pleased with himself or sees a chance of making a little money in some way that is not perfectly fair: some moment, in fact, at which it would be very convenient if Christianity were not true. And once again his wishes and desires will carry out a blitz. I am not talking of moments at which any real new reasons against Christianity turn up. Those have to be faced and that is a different matter. I’m talking moments where a mere mood rises up against it.
Now faith, in the sense in which I am here using the word, is the art of holding on to things your reason has once accepted, in spite of your changing moods. For moods will change, whatever view your reason takes. I know that by experience. Now that I am a Christian I do not have moods in which the whole thing looks very improbable: but when I was an atheist I had moods in which Christianity looked terribly probable. This rebellion of your moods against your real self is going to come anyway. That is why faith is such a necessary virtue: unless you teach your moods “where they get off,” you can never be either a sound Christian or a sound atheist. but just a creature dithering to an fro, with its beliefs really dependent on the weather and the state of its digestion. Consequently one must train the habit of Faith.
The first step is to recognize that your moods change. The next is to make sure that, if you have once accepted Christianity then some of the main doctrines shall be deliberately held before your mind for some time every day. That is why daily prayers and religious reading and church going are necessary parts of the Christian life. We have to be continually reminded of what we believe. Neither this belief or any other will automatically remain alive in the mind. It must be fed. And, as a matter of fact, if you examined a hundred people who have lost their faith in Christianity, I wonder how many of them would turn out to have been reasoned out of it by honest argument? Do not most people simply drift away. ~ C.S. Lewis ‘Mere Christianity’ ps.121-24, MacMillan Publishing C)., Inc New York, N.Y.
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