We all experience ambedo - a moment of melancholic or rapturous trance in which you become completely absorbed in vivid sensory detail that you would otherwise ignore. Like an autumn leaf falling in the wind, or rain drops skittering down a window pane. I think photographers experience ambedo more frequently than most, and perhaps it is the elusive chase to capture these fleeting moments that drives us. Often it's like grabbing a snowflake - open your palm and it has already melted away. But occasionally, you do frame a glimpse of eternity. Those are worth keeping.