On those occasions when I have someone walking with me, I am often surprised at what they do and do not see. I am firmly convinced that seeing is a talent that comes from looking with understanding. You can look all day at the same scene and if you do not understand what you are looking at, your mind will ignore the details. The more you learn, the more you are able to see.
"It is my privilege to let you see things you would otherwise never see." James Tanner