"Bhikkhus, there are these four things that are inconceivable, not to be speculated over or thought about; thinking about which would lead to confusion and distress.

What four?

1. The domain of wisdom of the Buddhas, bhikkhus, is inconceivable, not to be speculated over or thought about; thinking about which would lead to confusion and distress.

2. The domain of wisdom of one in jhānas, bhikkhus, is inconceivable, not to be speculated over or thought about; thinking about which would lead to confusion and distress.

3. The result of kamma (deeds), bhikkhus, is inconceivable, not to be speculated over or thought about; thinking about which would lead to confusion and distress.

4. Speculation about the world or thoughts about the origin of the universe, bhikkhus, are inconceivable, not to be speculated over or thought about; thinking about which would lead to confusion and distress.

These, indeed, bhikkhus, are the four inconceivable things, not to be speculated over or thought about; thinking about which would lead to confusion and distress."

Related Teachings:

The Truths of All Buddhas (SN 56.24) - The Buddhas of the past, future and present have truly understood the four noble truths as they really are.

Way of Practice to eradicate the conceit “I Am” (SN 22.89) - Venerable Khemaka is ill, and some elder bhikkhus ask Dāsaka to convey their concern to him. A series of exchanges ensue, mediated by Dāsaka, until Khemaka, despite his illness, goes to see the elder bhikkhus himself. The elders inquire about his understanding of the Dhamma. Khemaka explains that while he does not identify any of the five aggregates (form, feeling, perception, formations, and consciousness) as self, he still experiences a subtle “I am” conceit associated with these aggregates. He likens this to the lingering scent on a cleaned cloth, which eventually fades away.