Knowing not-knowing—best. 

Not knowing this knowing—sick. 

Being sick of sickness—one’s not sick. 

Thus a sage is free of all sickness...(Tao)

Complaining and reactivity are favorite mind patterns through which the ego strengthens itself. For many people, a large part of their mental-emotional activity consists of complaining and reacting against this or that. 
By doing this, we make others or a situation "wrong" and ourselves "right."

Through being "right," we feel superior, and through feeling superior,  we strengthen our sense of self. 
In reality, of course, we are only strengthening the illusion of ego.

Can we observe those patterns within ourselves and recognize the complaining voice in our head for what it is?

Eckhart Tolle

The beginning of the universe,

is the mother of all things.

Knowing the mother, one also knows the sons.

Knowing the sons,yet remaining in touch with the mother,

brings freedom from the fear of death.

Keep your mouth shut.

Guard the senses.

And life is ever full.

Open your mouth,

always be busy,

and life is beyond hope.

Seeing the small is insight;

Yielding to force is strength.

Using the outer light, return to insight.

And in this way be saved from harm.

This is learning constancy.

Tao Te Ching by Lao Tsu

"Better stop short than fill to the brim.
Oversharpen the blade, and the edge will soon blunt.
Amass a store of gold and jade and no one can protect it.
Claim wealth and titles, and disaster will follow.
Retire when the work is done.
This is the way of heaven."(Tao)

Why do you stay in prison
when the door is so wide open?

Move outside the tangle of fear-thinking.
Live in silence.(RUMI)

"All objects, all people
that tug at your desire:
unzip them.
See what tumbles out."