Do not do evil because it is small, and do not do good because it is small. Zhuge Liang's "Book of Commandments"

Don't ignore small gains and neglect repairs, and don't ignore small losses and fail to prevent them.

Don’t let petty resentment make you feel distant, and don’t let new grudges make you forget old kindness.

A mountain can grow as high as it can without skimping on earth, and a sea can grow as deep as it can without skimping on water.

If you don’t accumulate steps, you can’t build a thousand miles; if you don’t accumulate small streams, you can’t build a river or sea.

A thousand-mile embankment collapses in an ant nest.

How can you sweep the world if you don’t sweep one house?