Aslan's Table

"Why is it called Aslan's table?" asked Lucy presently.

"It is set here by his bidding," said the girl, "for those who come so far...."

(The Voyage of the Dawn Treader)

As told to us in The Voyage of the Dawn Treader, Aslan established a beautiful oasis on an island in the middle of the Easter Sea. On that island, attended to by a retired star, is a magnificent feast, unlike any found even amongst the wealthiest of kings. Furthermore, the feast is renewed every day such that, in theory, one can spend however much time they wanted there and never lack for food. 

Furthermore, the knife the White Witch used to kill Aslan is placed on the table with the feast. We are told that it was brought there to be kept in honor. 

The entire scene raises a number of questions. First, it appears that Alsan is presenting a reward for those who have managed to sail that far east. Is simply sailing east a worthwhile endeavor that it should be rewarded? Is the physical prowess and capability deserving of reward? This all seems based on physical strength not spiritual yearning or growth. Or is there some positive attitude or motivation that would lead someone to that island?

Second, what is the point of the feast. Is it a reward, as in good job, time to turn around? Is it a taste of what is to come and an encouragement to keep going? Or is it a place to stop and live out the rest of one's life there?

Third, what is the goal of having a star administer the island? Is that what stars usually do (actually, given Coriaken maybe yes). 

Finally, why is the Stone Knife brought there of all places. Why not keep it in Narnia where it can be revered and actively honored by many?

I realize we're in the middle of a bunch of things - hopefully we'll get back to all of them. But these are some of the questions I've been thinking of recently.