Ajahn Chah

Samadhi is capable of bringing much harm or benefit to the meditator.

You cannot say it brings only one or the other.

For one who has no wisdom, it is harmful.

But for one who has wisdom, it can bring a real benefit.

It can lead them to insight.

That which can be most harmful to the meditator is absorption samadhi, jhana.

The Samadhi with deep, sustained calm.

This Samadhi brings great peace.

Where there is peace, there is happiness.

Where there is happiness, attachment and clinging to that happiness arise.

The meditator does not want to contemplate anything else.

They just want to indulge in that pleasant feeling.

When we have been practicing for a long time, we may become adept at entering this samadhi very quickly.

As soon as we start to note our meditation object, the mind enters calm.

We do not want to come out to investigate anything.

We just get stuck on that happiness.

This is a danger to one who is practicing meditation.

we must use upacara samadhi, access concentration.

Here we enter calm and then when the mind is sufficiently calm, we come out and look at the outer activity of what's happening in the mind.

We must look at outer activity