When consciousness or Spirit flows cleanly through your soul, as it is meant to, as it does in animals, just being is bliss.
You notice animals sit and do nothing and are perfectly content.
It's a big job, to get down to the bottom of your soul, get underneath everything you hid, and stored...
It's like cutting through a jungle, you have to be really really brave and strong and true, just like the action heros.
The soul is a mega mega scene, and if you purify it, then just being is bliss immeasurable and there is no "reason" or "philosophy" required.
Just know that the pure flow of consciousness or spirit through your soul is heaven on earth, and it is possible to experience, and it is a great adventure to find it.
If you make it there, you can make it anywhere.
A.H. Almaas has the best books "The Inner Journey Home" being a summary of his ten or so other books... He's deep deep but true true.
Otherwise, Eckhart Tolle is good and Ken Wilbur from what I hear.
Religious books are dumb.