The end will be the arrival.
The end will be to arrive.
The end will be to arrive where we started.
I think he is saying that we will go on searching and searching, but at last, finally, when we have finished searching and when we have come to the last place left to discover --
then we will find that it is the very place we started from --
but now we shall know this starting place for what it truly is.
Perhaps this is an example:
A man begins his life with an uncomplicated and trusting idea of God.
As he goes through life, he samples various philosophies and cosmologies.
He switches between Buddhism and atheism and secular humanism.
But in the end, he finds himself back with his original Christian beliefs,
only this time, they are sophisticated, complex, well-informed, accurate, etc.
He has done all kinds of exploring, only to end by arriving back where he started from. But now he "knows" (understands) what that starting place "really" is.
A young man may love his young wife, but after a few years of marriage, he grows bored and dallies with other women. But after years of this, he ends up back loving his wife -- only this time around he has a true appreciation of her true worth.
Student or Learner