he who knows himself is intelligent. - Laozi

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.

When people see some things as beautiful,
other things become ugly.
When people see some things as good,
other things become bad.

Being and non-being create each other.
Difficult and easy support each other.
Long and short define each other.
High and low depend on each other.
Before and after follow each other.

Therefore the Master
acts without doing anything
and teaches without saying anything.
Things arise and she lets them come;
things disappear and she lets them go.
She has but doesn't possess,
acts but doesn't expect.
When her work is done, she forgets it.
That is why it lasts forever.

Whoever is planted in the Tao
will not be rooted up.
Whoever embraces the Tao
will not slip away.
Her name will be held in honor
from generation to generation.

Let the Tao be present in your life
and you will become genuine.
Let it be Present in your family
and your family will flourish.
Let it be present in your country
and your country will be an example
to all countries in the world.
Let it be present in the universe
and the universe will sing.

How do I know this is true?
by looking inside myself.