The Christian is in a different position from other people who are trying to be good. They hope, by being good, to please God if there is one; or—if … - C. S. Lewis

The great difficulty is to get modern audiences to realize that you are preaching Christianity solely and simply because you happen to think it true; they always suppose you are preaching it because you like it or think it good for society or something of that sort. Now a clearly maintained distinction between what the Faith actually says and what you would like it to have said or what you understand or what you personally find helpful or think probable, forces your audience to realize that you are tied to your data just as the scientist is tied by the results of the experiments; that you are not just saying what you like. This immediately helps them realize that what is being discussed is a question about objective fact — not gas about ideals and points of view.

Looking for God—or Heaven—by exploring space is like reading or seeing all Shakespeare's plays in the hope that you will find Shakespeare as one of the characters or Stratford as one of the places. Shakespeare is in one sense present at every moment in every play.

God made us: invented us as a man invents an engine. A car is made to run on petrol, and it would not run properly on anything else. Now God designed the human machine to run on Himself.