|We shall not cease from exploration|
And the end of all our exploring
Will be to arrive where we started
And know the place for the first time.
This is a section of T. S. Eliot's poem, Little Gidding.
Life is circular, a series of increasing "a-ha!" as we first learn and then re-learn and then re-learn again those things which we felt we already knew. But each time that we come back to where we first viewed it, we know it bigger and more. This circular route generally happens in a span of years, but the "oh wow" of the re-visit is well worth it. And then we realize how little we really knew before.
I think Eliot captured this quite well.