Humans spend about a third of their lives sleeping. Unconsciously. Just like breathing, sleep is believed to be especial for our survival, as means of relaxation and rejuvenation. We all practice it every day.
Yogis of the past developed a practice, derived from tantras, which allowed them to sleep continuously and direct their awareness towards achieving deeper and broader relaxation than in a state of sleep.
Swami Satyananda, in his book “Yoga Nidra” (ISBN: 8185787123) says:
People feel that they are relaxing when they collapse in an easy chair with a cup of coffee, a drink or a cigarette, and read a newspaper or switch on the television. But this will never suffice as a scientific de