To know yet to think that one does not know is best; Not to know yet to think that one knows will lead to difficulty.
For the wise man looks into space and he knows there is no limited dimensions.
One who knows that enough is enough will always have enough.
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.
He who knows others is learned; he who knows himself is wise.
He who knows others is clever; He who knows himself has discernment.
He who knows he has enough is rich.
The sage wears clothes of coarse cloth but carries jewels in his bosom; He knows himself but does not display himself; He loves himself but does not hold himself in high esteem