Here's a workshop I took with Kokyo Henkel last weekend on mirror awareness in case you didn't know this was about a Zen teaching:
Or, if you don't want to spend three hours, then read this:
Song of the Jewel Mirror Awareness
The Dharma of thusness
Is intimately conveyed by Buddha Ancestors.
Now you have it, Keep it well.
Filling a silver bowl with snow,
Hiding a heron in the moonlight.
They are similar though not the same.
Side by side you can see the differences.
The meaning is not in the words,
Yet one pivotal instant can reveal it.
Move and you are trapped;
Miss and you fall into confusion and doubt.
Turning away and touching are both wrong,
For it is like a massive fire.
To depict it with complex words
Is to defile it.
In the darkest night,
It is perfectly clear.
In the brilliance of dawn,
It remains hidden.
It acts as a guide for beings.
Its use removes all suffering.
Although it is not created,
It is not beyond words.
It is like facing a jewel mirror;
Form and image behold each other.
You are not it; Yet it is you.
Like a newborn child,
It is endowed with five aspects.
No coming, no going,
no arising no abiding.
“Baba wawa” is there anything said or not?
In truth, this has no meaning,
For the words are not yet clear.
Like the six lines of the double split hexagram,
The relative and absolute integrate.
Piled up, they make three;
The complete transformation makes five.
It is like the taste of the five-flavored herb,
Like the diamond thunderbolt.
Wondrously embraced within the absolute,
drumming and singing go together.
Penetrating the source and traveling the way;
You cover the territory and embrace the road.
Complications are auspicious;
Do not resist them.
What is natural and inconceivable,
Belongs neither to delusion nor enlightenment.
Causes and conditions at this moment
Shine completely in the silence.
So fine, it enters nowhere,
So vast it exceeds all bounds.
A hairsbreadth deviation
And you are out of harmony.
Through the teachings of sudden and gradual,
Different methods have arisen.
Even though you master such teachings,
The truth keeps on escaping.
Sitting still, yet inwardly moving,
Like a tethered colt, a trapped rat.
The Ancestors pitied them,
And offered them the teachings.
According to their delusions,
they called black as white.
When delusions disappear,
The natural mind reveals itself.
If you want to follow the ancient path,
Please observe the Ancients of former times.
Some try to attain the Buddha Way
By gazing at a tree for ten eons
They are like a tiger with tattered ears
Or a hobbled horse.
With low aspirations,
You will see jewel pedestals, fine clothing.
And with a sense of wonder,
You will see black badgers and white bulls.
Yi, with his archer's skill,
Could hit the mark from a hundred paces.
But when arrow points meet head on,
How could it be a matter of skill?
When the wooden man begins to sing,
The stone woman gets up to dance.
This does not come by knowing,
Nor does it involve ideas.
Ministers serve their lords
Children obey their guardians.
Not obeying is not filial,
Failure to serve is of no help.
Practice invisibly, work intimately,
Be the fool with no voice.
For realizing true continuation
Is called ∞ the host within ∞ the host.