Here's where Christianity comes out as a fighting religion. It insists on being right and that insistance brings on people committed to destroying it.
Professor Lewis puts it bluntly. Being a Christian meahs that where Christianity differs from other religions, Christianity is the right religion. "As in arithmetic -- there is only one right answer to a sum, and all other answers are wrong (but some of the wrong answers are much nearer being right than others."
"I Am the way, the truth and the life."
Jesus claimed that He is the only way to heaven and that there is no other way that leads to heaven. No matter how hard anybody may try, if he/she wants to go to heaven he/she will have to go through Jesus. If you want to go to London from New York, you need a specific ticket to go to that particular place. But if you think, "I will go to airport and catch any flight", assuming that every flight is going to London, then you will never reach the place because you need to catch the specific flight which is going to London. In the same way if we want to go to heaven, we should determine our way. And Jesus said that He is the way… and that no one can go to the Father except through Him. (See Chapter 3).
Lewis sees God as quite definitely good. "God takes sides, loves love and hates hatred, wants us to behave in one way and not in another.