Ajahn Chah

He simply observed and remained aware.

If he experienced something negative, he didn't become negative.

And why was that?

Because his mind had been cut free from such causes and conditions.

He'd penetrated the truth.

the conditions leading to rebirth no longer existed.

This is the knowing that is certain and reliable.

This is a mind that is truly at peace.

This is what is not born, doesn't age, doesn't get sick,

and doesn't die.

This is neither cause nor effect, nor dependent on cause and effect.

This mind, the citta, is above and beyond birth and death, above and beyond happiness and sorrow, above and beyond both good and evil.

What can you say?

It's beyond the limitations of language to describe it.

All supporting conditions have ceased and any attempt to describe it will merely lead to attachment.

The words used then become the theory

Theoretical descriptions of the mind and its workings are accurate but the Buddha realized that this type of knowledge was relatively useless.

We understand something intellectually and then believe it.

But it's of no real benefit.

It doesn't lead to peace of mind.