Theta Brainwave - Awakening to Sleep

Before going to sleep, we experience what he refers to as state akin to sleep. This is theta brainwave or what is known as hypnagogic state in psychology. There's many that actually enter the state for creative application. Edgar Allan Poe and Salvador Dali used to nap with a steel ball in their hands. So they would wake up when the ball hit the floor. And this is how they would know they were in the state for their creative initiatives.