"not-" (in "not-resting" and "not-becoming") is like non- in "non-attachment", which doesn't fall into the opposite extreme of aversion. It also is like the "an-" (less-) of "anatman" or "anatta" (self-less-ness); it rejects the extreme views but not the existence.
The bodhisattva ideal presents nirvāṇa as non-abiding nirvāṇa: a nirvāṇa where one doesn't 'automatically 'stay, where one isn't locked (by aversion, towards samsaric suffering), a nirvāṇa that doesn't prevent coming 'back' in saṃsāra to help others. This is a non-resting…
Curiosity is what allows not to be locked by knowledge or by certainties, but without falling into the naïve rejection of knowledge; curiosity opens the door to the 'beyond' the existence and non-existence of 'essential', 'unquestionable' knowledge, of certainties that blind and bias our responses; it is a dharma gate.
Click on image to continue:
Why Is It So Hard to Pay Attention? Or Is It? Curiosity May Be Key to Concentrating