Everything changes with as time goes by. All the good and all the bad things passes away. We could miss beautiful cultures and species while we could be grateful horrible disease passed away. Everything changes and the one as a human being could only catch the moment.
The image also depicts the struggle of light and dark. As light goes by all the bad things pass away. The drama is you never know if the thing is good or bad until it’s gone.
The holy bird of the Aztec – Quetzal helps to bring this uncertainty in the meaning of things. Time shapes things good or bad. So one is always loosing until he could reach the blessing of a single moment.