i think zen has taught me more about experience of "big mind" or total consciousness than many other tools of understanding. the koan is a key tool to this understanding. contemplating your face, before you were born, is instructive. the double bind is a useful tool as long as it does not become a trap.
the contemplation of, and engaging in "correct action" is also very instructive.
if the parent reality does exist, it is necessary for us to be mostly ignorant of it. imagine never having played a game without having to cheat as a mandatory part of the game. there would be no entertainment or learning involved. the game would cease to be engaging or meaningful.