When he and lucy met up again and left the wardrobe and went back to talk to Susan and Peter, Edmund was also sacrificing the trust between his sibling. When he said the trip was unreal. In this story I think it took a few times for Edmund to understand the consequences of sacrifice
When all four of them arrived in Narnia they were all sacrificing their safety. They didn’t know what was ahead of them. They didn’t bring any food or water to drink or eat, they followed a robin who they did not know, and they talked to a beaver which could have been on the witches side. They didn’t know many things when it came to Narnia and the new world. They were sacrificing everything.
Meeting Aslan was also a huge sacrifice. They were meeting a lion of all things, for the first time and only going off what the beavers said to them. Should they have trusted the beaver in the first place, I don’t know. They could have been set up to be eaten by Aslan, no one really knew. Meeting Aslan could have been a disaster. And believing what he was saying was also a big