If you understand others you are smart.
If you understand yourself you are illuminated.
If you overcome others you are powerful.
If you overcome yourself you have strength.
If you know how to be satisfied you are rich.
If you can act with vigor, you have a will.
If you don't lose your objectives you can be long-lasting.
If you die without loss, you are eternal.
Nothing in the world is more flexible and yielding than water. Yet when it attacks the firm and the strong, none can withstand it, because they have no way to change it. So the flexible overcome the adamant, the yielding overcome the forceful. Everyone knows this, but no one can do it.
Intellectual knowledge exists in and of the brain. Because the brain is part of the body, which must one day expire, this collection of facts, however large and impressive, will expire as well. {But spiritual insight transcends death.}
Shape clay into a vessel;
It is the space within that makes it useful.
Cut doors and windows for a room;
It is the holes which make it useful.
Therefore benefit comes from what is there;
Usefulness from what is not there.