A portrait is a conversation with the person you were, are, and are going to be.
My aunt was a teenager in 1930's Toronto. One day she was walking down a busy street when a photographer ran out and asked her if she would come into his studio to be photographed.
She said "yes".
It was a different time.
The photographer made two pictures of her that day and a week later she walked by the studio and saw a group of people staring in the window. She walked over and could hear the comments about who the movie star could be. It was a picture of her. She held onto that picture and kept it displayed prominently on her coffee table for the rest of her life.
Tempus fugit, this moment is forever.