I _accidentally_ fell into a vipassana state of mind after the first time trying a particular religious chant, seriously, from out of the pains of boredom as a 20 year old.
At the time I lived nearby mountains, and after 'coming to', I saw them through the window. I cannot describe to you the overwhelming feeling of beauty and awe that crashed over me. It was as though this was the very first time I had ever seen mountains. I think the best description I can manage comes from 'Both Sides Now' by Joni Mitchell.
'I've looked at clouds from both sides now From up and down, and still somehow It's cloud illusions I recall I really don't know clouds at all'
The experience was so disorienting. As if I was seeing the mountains for what they were directly through my senses and not mediated by my knowledge of what mountains were like, linguistically.
It changed my entire life -- weeks later later I lost my job and fell into a 5 year extreme depression / anxiety spell in the attempt to reconcile my adolescent religious upbringing with the continued insight from that experience. Absolutely worthwhile, in hindsight, but it cost me near everything for it.
ducks
So the only course of action was not to search for rocks to cling to, but of learning how to swim, and dive in. As backwards as it may read, I only felt secure after having let go of myself.
As odd as this description may sound to someone who has not experienced this, it is instantly recognizable to those who have -- which helped discover others who traversed this before. It so happens that Buddhists have a rich tradition for navigating these waters, which helped satisfy my intellectual curiosity of what was happening. To know that I was not 'defective' but merely in an initial stage of 'unlearning' was a big jolt of positively to my psychology.
What topics could I read about to learn more about this?
Then, follow your nose through the bibliography. =)
All the best to you.
On the other hand, I met my now-wife in the depression ward, which in the "active" phase right before my admission I visualized and wished for quite often.
I don't regret the 2-3 months of active ego dissolution phase, life has never been more beautiful and strangely peaceful and jarring at the same time.
However, I did lose my job, my apartment and almost permanently lost my sanity as well, but now in hindsight it looks like it was all for the better.
Nevertheless I don't think you should force something like this (like I very much did), the consequences to internal and external reality can be absolutely dramatic and I've preferred to live in peaceful ignorance since then... save for the short moments of.. remembering. Everything and nothing at once.