Ajahn Chah

As the Buddha said, the mind is merely the mind.

It's not a being, a person, a self or yourself.

It's neither us nor them.

The Dharma is simply the Dharma.

It's a natural selfless process.

It does not belong to us or anyone else.

Whatever an individual experiences, it all falls within five fundamental categories, or khandhas, body, feeling, memory and perception, thoughts and consciousness.

Insight, Vipassana, is one end of the stick.

and serenity, samatha, the other.

If we pick it up, does only one end come up, or do both?

When anyone picks up a stick, both ends rise together.

Which part then is vipassana, and which is samatha?

Samatha.

Where does one end and the other begin?

They are both the mind.

As the mind becomes peaceful, initially the peace will arise from the serenity of Samatha.

We focus and unify the mind in states of meditative peace, Samadhi.

However, if the peace and stillness of Samadhi fades away, suffering arises in its place.

Why is that?

Because the peace afforded by Samatha meditation alone is still based on attachment.