The things in the picture were moving. It didn't look at all like a cinema either; the colors were too real and clean and out-of-doors for that. Down went the prow of the ship onto the wave and up went a great shock of spray. And then up went he wave behind her, and her stern and her deck became visible for the first time, and then disappeared as the next wave came to meet her and her bows went up again. At the same moment an exercise book which had been lying beside Edmund on the bed flapped, rose and sailed through the air to the wall behind him, and Lucy felt all her hair whopping round her face as it does on a windy day.
Eustace has started to tease the Pevensies about Narnia because he does not believe that it really exists. This then develops into his teasing Lucy about the picture on the wall that his mother only keeps because it was a gift. Lucy likes it because it looks like a Narnian ship and because it looks as if it is really moving; when Lucy says this aloud she. Whims the enchantment which makes what she has just said actually happen. Instead of appearing to move, the ship really does move, and to prove that it is not just a trick of the eyes, the children start to feel what it would be like to be on the. Pat in the picture instead of just looking at it and imagining. This is the real start of their adventure and like as in precious Chronicles, the doorway to Narnia is always through something innocent looking within the house.
The night we lost our mast (there's only a stump left now), though I was not at all well, they forced me to come up on deck and work like a slave. Lucy shoved her oar in by saying that Reepicheep was longing to go only he was too small. I wonder she doesn't see that everything that little beast does is all for the sake of showing off. Even at her age she ought to have that amount of sense. Today the beastly boat is level at last and the sun's out and we have all. Even jawing about what to do. We have food enough, pretty beastly stuff most of it, to last for sixteen days. The real trouble is water. Two casks seem to have got a leak knocked in them and are empty (Narnian efficiency again). On short rations, half a pint a day each, we've got enough for twelve days. (There's still lots of rum and wine but even they realize that would only make them thirstier.)
This extract from Eustace's journal is very illuminating and also explains why it was necessary for Eustace to be turned into a dragon and subsequently "healed" by Aslan. Eustace sees himself as both above the rest of the party and also horribly bullied by them. He is a narcissist and seems to think that his feeling unwell should have been the focus of the group rather than "all hands on deck". The quote also shows she terrible resentment that Eustace felt for Reepicheep and his need to make the others take his side over the plucky mouse's. There is also some humor in this in that the author is depicting Eustace as a typical colonial Englishman who goes about the globe with a very superior attitude and is disdainful of the way things are done everywhere else - his sarcastic observation about Narnian efficiency implies that the ship would be run far better were the English in charge.
But there I have another name. You must learn to know me by that name. This was the very reason why you were brought here to Narnia, that by knowing me here for a little, you may know me better there.
At the close of the novel it is at its most allegorical and as Aslan tells the children they must listen to his word and then live by it in their own country, this is an Allegory for them being instructed by Jesus to spread the word of God. Aslan wants them to take what they have learned by getting to know him and introduce him to the world by living in a way that both represents him and allows them to get to know him even better. By living with him in their hearts they will come to know him even more than they already do having spent time with him in Narnia.
