Heavy is the root of light.

So the unwanting soul sees what's hidden, and the ever-wanting soul sees only what it wants.

Being satisfied with little, you can gain much. Seeking much you will go astray. The wise heeds this precept. If it could be so with all people!

One who believes in himself has no need to convince others.

Knowing others is intelligence; knowing yourself is true wisdom. Mastering others is strength; mastering yourself is true power.

So sometimes things are ahead and sometimes they are behind; Sometimes breathing is hard, sometimes it comes easily; Sometimes there is strength and sometimes weakness; Sometimes one is up and sometimes down. Therefore the sage avoids extremes, excesses, and complacency.

A good door needs no lock, still it can't be opened.