When crossing a river, if your boat is struck by an empty boat then you will not take offense nor be angry, but if your boat is struck by a boat with a passenger you will yell and become furious.
Either way, empty or not, the effect on you is the same -- your boat is struck. But in one case you take it personally and in the other you don't.
This is a lesson on how people treat you. If they see your boat as full then they take your offenses (intentional or not) personally. But if they see your boat as empty they don't see your offences as offence.
Therefore, seek to empty your own boat. Seek to be such that people don't notice you. In this way people will not desire to contend against you and you will have peace.
The Empty Boat by Chuang Tzu