You do not have to subscribe to Zen Buddhism, or indeed be religious, to appreciate the wisdom of these sayings (many of which are not, in any case, explicitly spiritual or Buddhist in origin or application). I know quotes can seem trite and vacuous, but a lot of these are worth reflecting on.
My personal favorite is the following by B. D. Schiers (whom I oddly cannot find much information on).
If you want to change the world, start with the next person who comes to you in need.
This goes back to one of the first lessons I ever learned on the path to better moral living: that no good deed is too small, and that change on any level, even just the way we treat a stranger on the street, can be the start of a better world in the aggregate.
While the bigger picture is of course important and should not be overlooked, but you have to start somewhere, so why not during the routine interactions and moral decisions we encounter every day?
Feel free to share your favorite quotes from this list and what you take away from them — or offer your own if not mentioned.
Hat tip to Buddaimonia.com for the list.