Who are we?
Sometime in your life all of us get to the insight that nothing we experience is experienced for the first time. That life is merely a cycle all must go through, from birth, through adolescence to death. That the things children feel move into things adolescents feel, and into things elderly people feel.
(Still, when we see people in the streets, we immediately see them as of a particular type, as though they have always been of that type.)