The Related Suttas Collection 36.12

2. In Private

In the Sky (1st)

“Bhikkhus, various winds blow in the sky. Winds blow from the east, the west, the north, and the south. There are winds that are dusty and dustless, cool and warm, weak and strong.

In the same way, various feelings arise in this body: pleasant, painful, and neutral feelings.

There are many and various winds that blow in the sky. From the east they come, also the west, the north, and then the south.

They are dusty and dustless, cool and sometimes warm, strong and weak; these are the different breezes that blow.

So too, in this body feelings arise, pleasant and painful, and those that are neutral.

But when a bhikkhu is keen, not neglecting focused awareness, that astute person understands all feelings.

Completely understanding feelings, they’re without defilements in this very life. That knowledge master is firm in principle; when their body breaks up, they can’t be reckoned.”