[quonn]

I think I already answered those above. I draw the line between 3 and 4, possibly between 4 and 5. I don't know for sure. But there are good reasons to hold this belief.

> the Buddhists call this nirvana, and it's quite difficult to actually achieve.

Not really. The zen buddhists call what I described kensho and it's not very hard to achieve. I specifically said a few seconds. Probably anyone who wholeheartedly meditated for some time has experienced this.

Nirvana, on the other hand, is just the other side of practice-and-enlightenment as a drawn out process. You may call it hard to achieve, others may call it the dharma gate of ease and joy.