You see what is happening. The Christ Himself, the Son of God who is man (just like you) and God (just like His Father) is actually at your side and is already at that moment beginning to turn your pretence into a reality. This is not merely a fancy way of saying that your conscience is telling you what to do. If you simply ask your conscience, you get one result; if you remember that you are dressing up as Christ, you get a different one. There are lots of things which your conscience might not call definitely wrong (specially things in your mind) but which you will see at once you cannot go on doing if you are seriously trying to be like Christ. For you are no longer thinking simply about right and wrong; you are trying to catch the good infection from a Person. It is more like painting a portrait than like obeying a set of rules. And the odd thing is that while in one way it is much harder than keeping rules, in another way it is far easier.
The real Son of God is at your side. He is beginning to turn you into the same kind of thing as Himself. He is beginning, so to speak, to ‘inject’ His kind of life and thought, His Zoe, into you; beginning to turn the tin soldier into a live man. The part of you that does not like it is the part that is still tin.
Quotes from Mere Christianity, Part 74
C.S. Lewis, Mere Christianity (1952; Harper Collins: 2001) 189.