Our Time vs God's Time

One thing that I have noticed and this goes along with Suzannes' earlier post "Humans in Narnia" and something that I mentioned in class, is that yes these humans and dwarfs enter into worlds that are unknown to them to save the world that is in peril need of a savior of some sort. However in Narnia, as Aslan is considered a Christ-figure, why does he need the presence of Humans to defeat the issues of his world. Going back to what I said in class, it was these people from a different world saving one another. I think that we as people in this world need to work together to save one another in different parts of the world as well as our own neighborhoods.
I was also confused by why the moments the children are brought into Narnia, they were in need of some help as well. Lucy needs help for hiding from her brothers, Eustace and Jill are hiding from the bullies, Lucy, Edmund, Susan, and Peter are being "saved" from school. I have begun to realize that none of these moments was it ever their time, it was Aslan's or Narnia's time. Was Aslan saving them at times when they were in need? It makes me think that it was to teach them that when they are in need, others may be in need as well. Maybe to the point where not to focus on our issues, but there maybe people in greater need than ourselves. Just as it is in this world, it is never our time, as much as we would want it to be, it is always God's time. Our concept of time is and always will be different than God's.