Change
Phases, stages, periods, eras. As things change, they may improve, may worsen.
Everything and everyone changes.
We all change. We can change on purpose, with purpose, for good.
We are in no way the same forever, and nothing and nobody lasts forever.
We are here now, we feel this way, for now.
We think like this or like that, in each confluence of circumstances.
Trends, patterns, characteristics and traits merely represent moments in time.
By changing perspectives, lenses delineate, define this and that in different ways.
Only essence is immutable, perhaps.