Flowing water never goes bad; our door hubs never gather termites

Similar sayings:

Water that has reached its level does not flow Water that has reached its level does not flow
The rose has thorns only for those who would gather it The rose has thorns only for those who would gather it
Teachers open the door You enter by yourself Teachers open the door You enter by yourself
Insects do not nest in a busy door-hinge Insects do not nest in a busy door-hinge
A man need never revenge himself; the body of his enemy will be brought to his own door A man need never revenge himself; the body of his enemy will be brought to his own door

Chinese sayings and proverbs