This Chinese proverb is one that is important for society and for one's self. To lead by example and to set yourself as a standard for other people to follow. In other words, by setting your good behavious and polite manners as an example. Other people around you will respect you with the same kindness and politeness.

It is important for us to act in a way that we are happy for everyone else around us to act.

以身作则
yǐ shēn zuò zé
To set a good example / Set yourself as the standard