Furthermore, a mendicant meditates by observing an aspect of principles with respect to the six interior and exterior sense fields. And how does a mendicant meditate observing an aspect of principles with respect to the six interior and exterior sense fields?

It’s when a mendicant understands the eye, sights, and the fetter that arises dependent on both of these. They understand how the fetter that has not arisen comes to arise; how the arisen fetter comes to be abandoned; and how the abandoned fetter comes to not rise again in the future.

They understand the ear, sounds, and the fetter …

They understand the nose, smells, and the fetter …

They understand the tongue, tastes, and the fetter …

They understand the body, touches, and the fetter …

They understand the mind, thoughts, and the fetter that arises dependent on both of these. They understand how the fetter that has not arisen comes to arise; how the arisen fetter comes to be abandoned; and how the abandoned fetter comes to not rise again in the future.

And so they meditate observing an aspect of principles internally …

That’s how a mendicant meditates by observing an aspect of principles with respect to the six internal and external sense fields.