Man or Rabbit?

CS Lewis' "Man or Rabbit?" is more of a lighter reading compared to previous ones like the Four Loves, and I tend to like more of Lewis' lighter reads. The reading is written as a response to the question, "Can't you lead a good life without believing in Christianity?" As Lewis never gives a straight answer, he explores the implications behind the question. He comments on the question, that whoever asks it is not interested in the truthfulness of Christianity, but rather they choose to believe things based on their helpfulness to their well being. 

I like Lewis' description on distinguishing between man and animals:

One of the things that distinguishes man from the other animals is that he wants to know things, wants to find out what reality is like, simply for the sake of knowing. When that desire is completely quenched in anyone, I think he has become something less than human. 

Lewis makes the point that Christianity presents its views on the universe. When a man approaches Christianity's claims, he must make a decision to say whether it is true or not. One of the most important quotes I've read so far is this: Knowledge of the facts must make a difference to one's actions. The fascinating thing about Lewis' quotes is that they can be so simple, and yet so heavily convicting. Knowledge should make a difference to a person, but one does not always act as if they are knowledgeable.
Another interesting point that stood out is the part about the good things that both Christians and Materialists do for fellow citizens. However, even with a common purpose in mind, the two will clash in the way they do things because of their beliefs.

To the Materialist things like nations, classes, civilizations must be more important than individuals, because the individuals live only seventy odd yearsach and the group may last for centuries. But to the Christian, individuals are more important, for they live eternally; and races, civilizations and the like, are in comparison the creatures of a day.

The Christian and the Materialist hold different beliefs about the universe. They can't both be right. The one who is wrong will act in a way which simply doesn't fit the real universe. Consequently, with the best will in the world, he will be helping his fellow creatures to their destruction.

Lewis makes an important point that even with the best intentions, people holding an untrue belief will ultimately lead people to destruction. I think this gives much more significance to the decisions one makes regarding their beliefs.