Since I live part of the year in Italy, I live in a society in which I'm the optimistic American relative to the people who I'm around there. And that has actually brought to my attention the fact that I do have some sort of optimism and has made me think about it enough that I can attempt an answer.
I must stay under the old tree in the midst of the long grass, the luxury of the leaves, and the song in the very air. It seems as if I could feel all the glowing life the sunshine gives and the south winds calls into being.