Consider: it is a sunny day.
I could probably have found a better sentence to illustrate my topic, but that was the one that passed through my mind this morning.
So much affects our outlook on life in its multi-facetedness.
Our location, climate, money, provisions, health, family, need, culture.
We are defined and affected by so many things, and each of these alters our perspective.
And sometimes a new awareness will change things completely - we are overhauled, undermined, and suddenly see life with new eyes.
So much depends on perspective.