Aṅguttara Nikāya
1. Ekakanipāta
III. Akammanīya Vagga
Not manageable
21. Bhikkhus, I do not know of a thing so unmanageable as the undeveloped mind. The undeveloped mind is unmanageable. This is the first.
22. Bhikkhus, I do not know a thing so adaptable as the developed mind. The developed mind is adaptable This is the second.
23. Bhikkhus, I do not know a thing so detrimental as the undeveloped mind. The undeveloped mind is detrimental. This is the third.
24. Bhikkhus, I do not know a thing so harmless as the developed mind. The developed mind is harmless. This is the fourth.
25. Bhikkhus, I do not know a thing so detrimental as an undeveloped, secretive mind. The undeveloped secretive mind is detrimentalṬhis is the fifth.
26. Bhikkhus, I do not know a thing so harmless as the developed manifest mind. The developed, manifest mind is harmlessṬhis is the sixth.
27. Bhikkhus, I do not know a thing that is so detrimental as an undeveloped mind that has no practise. The not practising, undeveloped mind is very detrimentalṬhis is the seventh.
28. Bhikkhus, I do not know a thing that is so harmless as a developed mind that makes much of it. The practising developed mind is harmlessṬhis is the eighth.
29. Bhikkhus, I do not know a thing that brings unpleasantness as an undeveloped mind. The undeveloped mind brings unpleasantness. This is the nineth.
30. Bhikkhus, I do not know a thing that brings pleasantness as a practising developed mind. The practising developed mind brings pleasantness. This is the tenth.