Ritual:The Cracks Inbetween!

Chatting with your Higher Self!
While achieving symbiosis with your superconscious/holy guardian angel/higher self is extremely difficult, opening a dialog with them is fairly easy. By activating the 8th circuit (i.e. the crown sephirot/chakra and forcing it downwards into the head repeatedly for long sessions you cause minor atrophy to the corpus callosum. When the brain attempts repair by growing new fibers it connects parts of the brain that have never talked before. The result is dramatic. You'll grasp concepts you previously hand't and will discard older models of perception. Most striking of all, it gives the right hemisphere access to rudimentary speech functions. While this hemisphere is a part of you, it is also separate from you, having its own sentience and selfhood, quietly performing (mostly) superconscious functions in the background. They do not receive negative (or punishment) chemicals/emotions or subconscious animal impulses. Thus, they are like a version of you not soiled by the ugliness of outside world.

Step one
Sit down, close your eyes and enter gnosis. Imagine that you have a second mouth on the very top of your head. When you inhale try to feel the breath entering in your second mouth and feel the breath exiting your nose when you exhale.

Step two
You will eventually begin to feel a warm pressure/tingling that pulses down the center of your head followed by an uncomfortable shocking/stinging in this area. It can feel "foreign" in the same way another person touching you does. Don't panic. This is the brain trying to signal you to stop because it senses damage being caused to the corpus callosum. You may start twitching, seeing weird colors/shapes or even hearing bizarre audio garbage. These are the fibers dying.

Step three
Finally, you will feel a hot/cold rushing up and down your body. For some this is brutally uncomfortable. Don't fight it, just let it happen. Most break into psychedelic ecstasy at the very end and when you start coming to your superconscious/holy guardian angel/higher self will begin talking to you, most likely trying to comfort you. Welcome to your new world.

Source

 * The Psychonaut's Field Manual