Jiddu Krishnamurti, my favorite author when it comes to the non-dual states of awareness and everything else, for that matter.
He is direct, honest, unfattered by any tradition, and in my opinion, a fresh breeze in a world full of dogmatic and traditional hangups that are most difficult to awaken from for many “spiritual masters”.
Jiddu Krishnamurti on the Truth:
“I maintain that truth is a pathless land, and you cannot approach it by any path whatsoever, by any religion, by any sect. That is my point of view, and I adhere to that absolutely and unconditionally.
Truth, being limitless, unconditioned, unapproachable by any path whatsoever, cannot be organized; nor should any organization be formed to lead or to coerce people along any particular path.
If you first understand that, then you will see how impossible it is to organize a belief. A belief is purely an individual matter, and you cannot and must not organize it. If you do, it becomes dead, crystallized; it becomes a creed, a sect, a religion, to be imposed on others.
This is what everyone throughout the world is attempting to do. Truth is narrowed down and made a plaything for those who are weak, for those who are only momentarily discontented.
Truth cannot be brought down, rather the individual must make the effort to ascend to it. You cannot bring the mountain-top to the valley. If you would attain to the mountain-top you must pass through the valley, climb the steeps, unafraid of the dangerous precipices.”
—Jiddu Krishnamurti, Krishnamurti: 100 Years