While we cannot describe its appearance (the equivalent), we can define its function. When a photograph functions as an Equivalent we can say that at that moment, and for that person the photograph acts as a symbol or plays the role of a metaphor for something that is beyond the subject photographed.
Minor White...innocence of eye has a quality of its own. It means to see as a child sees, with freshness and acknowledgment of the wonder; it also means to see as an adult sees who has gone full circle and once again sees as a child - with freshness and an even deeper sense of wonder.
Minor WhiteI have often photographed when I am not in tune with nature but the photographs look as if I had been. So I conclude that something in nature says, 'Come and take my photograph.' So I do, regardless of how I feel.
Minor WhiteThe reason why we want to remember an image varies: because we simply 'love it,' or dislike it so intensely that it becomes compulsive, or because it has made us realize something about ourselves, or has brought about some slight change in us. Perhaps the reader can recall some image, after the seeing of which he has never been quite the same.
Minor White