From a recent essay by Sammy Roth in the Los Angeles Times, a pair of proverbs, the first likely by St Augustine or St Ignatius, seen in the prayer book Mishkan T'fiah:

Roth notes, "... as seriously as I take myself and my work, the fate of planet Earth does not depend solely on me. The world is full of well-meaning people – including people I might sometimes disagree with – trying to make things better. None of us is in this alone. ..." He then quotes Rabbi Pirkei Avot:

It is not your responsibility to finish
the work of perfecting the world,
but you are not free to desist from it either.

_{(cf Tikkun Olam (2019-12-11), ...) - ^z - 2020-10-02}