The Human condition never would flourish if they are stuck in one place for too long, they venture out into “unaccustomed earth”, in search for more. And bid adieu to once who or what they were; but often very unceremoniously, it is done in many forms and ways and many times; the act of letting go, only when they come back a full circle do they realize that they had had what they always deserved.
Then again what is the destination without the journey? The fact we all forget is that the destination remains the same and somewhere we choose a wrong path which never the less leads to the same destination but the route is longer and sometimes better or worse.
Your understanding of the literature in question was very mature. Not many people are blessed with such lessons by induction
“Stray birds of summer come to my window to sing and fly away.
And yellow leaves of autumn, which have no songs, flutter and fall there with a sigh.”
And the last one was Tagore’s I think, your post