I have started reading this, a book in which he talks about wisdom, which I feel is a reasonably approachable subject but one which I have made little progress on. Dazzle me, oh Ajahn!
https://forestdhamma.org/ebooks/english/pdf/Things_As_They_Are.pdf
Jeroen
The question is really who are we and what do we really need?
Who am I and what do I need, I've been down this road before
Moment by moment all my needs are met, but my wants desire more...

Shoshin1
We get's a horse? I want's a pony … 
Underlying anxiety, madness (my speciality), group think and crazy dharma are still
part of our fall and get up again. There is success but only for the fanatics persistent.
Should we try dog chan like @Jeffrey or is it dzogchen …
meanwhile …
lobster