Wilber, K. (1998). The Eye of Spirit: An Integral Vision for a World Gone Slightly Mad. Boston: Shambhala.
Ken Wilber, touted to be "the most comprehensive philosophical thinker of our times", explores how to integrate fields of human inquiry in search of truth. He studies western philosophies, seek after eastern teachings. He tells us we all "fit" together to make one whole, we are all connected.
"In fact, all things, we might surmise, intuit to one degree or another that their very Ground is Spirit itself. All things are driven, urged, pushed, and pulled to manifest this realization. And yet, prior to that divine awakening, all things seek Spirit in a way that actually prevents the realization: or else we would be realized right now! We seek Spirit in ways that prevent it.
We seek for Spirit in the world of time; but Spirit is timeless, and cannot there be found. We seek for Spirit in the world of space; but Spirit is spaceless, and cannot there be found. We seek for Spirit in this or that object, shiny and alluring and full of fame or fortune; but Spirit is not an object, and it cannot be seen or grasped in the world of commodities and commotion.
In other words, we are seeking for Spirit in ways that prevent its realization, and force us to settle for substitute gratifications, which propel us through, and lock us into, the wretched world of time and terror, space and death, sin and separation, loneliness and consolation."
This book is rather dense. Enjoy the book!