I came across these two quotes recently and they really made an impression on me. Firstly:
Look deep, deep into nature, and then
you will understand everything better.
It reminded me of what I feel I am doing when I'm out with my camera, both photographically and mentally.
If one day cities disappear the fields will survive.
But if the fields disappear the cities will not survive.
The canal where I walk a lot is sadly one of the green areas where developers are now building houses and this quote says it all for me.