The camera is an instrument that teaches people
how to see without a camera." – Dorothea Lange
And:
"Don't cry because it's over. Smile because it happened." – Theodor Seuss Geisel
It's really kind of difficult to pick just one quote and say that's it for all time. Right now though, these are my favorite.
I love the first because it's so very true about photography, or anything else for that matter. I love the second because it's advice I need to remember on a daily basis.
Aloha!