Look out the window. Do you see the brick wall opposite? Of course you do. Now, concentrate on just one brick, any one will do. Now, imagine that the brick you have chosen is all of reality. Try to eliminate all the other bricks. Got it? Good, now try to imagine just one little point in that brick, perhaps where there is the slightest irregularity. Now, close your eyes and concentrate on that one point, which has become all that exists, including you. Now comes the hard part. Try to erase that point with your mind. How do you feel? Maybe just a little uneasy, maybe just a little afraid? You can’t erase that point, can you, because that would mean erasing your own consciousness, which is impossible. Now, open your eyes, take a breath, and accept that we are all locked permanently in the prison of our minds. What lies beyond that prison? Nothing? Maybe…or…