Dear Linda,
Thank you so much; it did help. In particular, the idea of focusing locally, and making the difference that way, was both resonant and comforting. Recently I have also been trying to make changes in my own life, and to find peace with the idea of small changes leading to lasting ones, as opposed to trying for the high drama or instant transformation. This fits; rather than banging my head against the wall in a kind of despair, the small steps which are possible give pieces of hope. I guess in the end the universe is made of the tiniest of particles and yet it is infinite, my beloved music and literature are made up of single notes and words, there is also the famous analogy of dropping water on a stone, etc.
Anyway, thank you for your response; just the fact that you have responded is helpful in itself.
Sending warm thoughts.