How I developed clairvoyance, precognition and lucid (astro) dreaming abilities to super heightened levels.
I lived in my parents cellar from childhood into early adulthood. My room had no windows. So at night time, I was in pitch black; I considered it my "chamber of dark." This went on for a little over a decade. I would literally stare into pitch blackness for years, and at the time, unbeknownst to me, I was affecting the natural development of my pineal gland; I was overproducing melatonin by overstimulating the pineal gland. The pineal gland works on the circadian rhythm. Along with the body's naturally occurring circadian rhythm, a normally developed pineal causes the body to feel sleepy when darkness enters the iris. This whole process induces the sleep state. In my situation, however, I was not falling asleep when subjected to the darkness as it was an unnaturally occurring dark environment. So I was developing this hormone, melatonin, plentifully, while fully awake. I was literally filling up by body with the hormone or "darkness."
Coupled that with semen retention allowed for me to build up the psychic abilities. Holding semen in your testicles for months on end causes the body to create DHT, a hormone that, in conjunction with melatonin, engenders spiritual sublimation.