Question: I am reading "Mere Christianity" by C.S. Lewis and just finished Chapter 12 in the 3rd section. In this chapter he is discussing the idea that we need to realize we cannot fight sin ourselves, but we must "leave it up to God". We need to trust in following the path of Christ rather than simply putting our own effort forth to stop sinning. That's all great, but I'm having a hard time with the last two paragraphs. I was hoping someone could clarify what he is trying to say.

> 
> I think all Christians would agree with me if I said that though Christianity seems at first to be all 
>  about morality, all about duties and rules and guilt and virtue, yet it leads you on, out of all that, into 
>  something beyond. One has a glimpse of a country where they do not talk of those things, except 
>  perhaps as a joke. Every one there is filled full with what we should call goodness as a mirror is filled 
>  with light But they do not call it goodness. They do not call it anything. They are not thinking of it. 
> 
> 
> They are too busy looking at the source from which it comes. But this is near the stage where the road 
>  passes over the rim of our world. No one's eyes can see very far beyond that: lots of people's eyes can 
>  see further than mine.
> 
> 
>

Answer: 
A man focused on loving others instead of himself will see the many rules shrink to but one. As Romans 13 says:

> 
> 8 Let no debt remain outstanding, except the continuing debt to love
>  one another, for whoever loves others has fulfilled the law. 9 The
>  commandments, “You shall not commit adultery,” “You shall not murder,”
>  “You shall not steal,” “You shall not covet,” and whatever other
>  command there may be, are summed up in this one command: “Love your
>  neighbor as yourself.” 10 Love does no harm to a neighbor. Therefore
>  love is the fulfillment of the law.
> 
> 
> 

An analogy I once heard was about flying an aircraft. There are many rules that are followed by the crew and imposed upon the passengers in order to make the flight safe. However, those rules have nothing to do with the purpose of flying. The purpose of flying is to get to your vacation spot, business meeting, wedding, or what-not. As you mature in the faith, the goal of your faith becomes more important, and you get less tripped up by the steps you need to take to get there.
He seems to be describing the bliss of faith where the knowledge of good and evil does not dominate our awareness. He does it kind of poetically. As we are sinful and not absolutely sure of our forgiveness, due to want of faith, the glory of Christ is hard to look at directly. We do not have such strong faith on this side of heaven not to be frequently taking our spiritual temperature. We are not so confident in the power of Christ's atonement as we aught to be. Therefore we still walk about thinking our sins are carried by ourselves and this makes us feel guilty and uneasy. The kingdom of heaven takes us to another world where sin and its horrors are no longer on our mind. Unfortunately we experience this grace imperfectly in this world. This does not mean that we can't peer into the land of grace by faith. Lewis just admits its heavenly and that others can see it better than he can.