It can seem as though we live in two Worlds, one with eyes open (the "real" world) and the other with eyes closed (an imaginary world). But a pawn closer inspection of how our brains render our sensory input, it can be possible to see that both of these are actually the same. Playing between the two with eyelids filtering just a small amount of light in can reveal the illusory quality of our visually perceived reality. The knowing of not only visual perception but all experience as being illusory in this way is similar to realizing that you're sitting in a movie theater watching light on a screen. Settling back into pure awareness is like noticing you're watching a movie but the movie is your moment to moment experience. Then the practice becomes maintaining contact with that awareness even when the script of your life twists and turns and ways that would otherwise completely suck you back into believing in the solidity of phenomena.