There are there moments of a life that click.  Call them epiphanies.  Call it satori.  Moments they are that cause one's perceptions of self to mesh --

... when Celeste cocks her head ... and she is about to go into a swing into my arms; she raises the opposite shoulder and pushes out her hip ... she lowers her eyelids, and the corner of her mouth goes up ...

And there are more of them than we would willingly admit.  I know, then, that I love her.