Hello,

My simple opinion here.

A direct contact with what some call the Divine can be cultivated no matter the state of the physical body or the brain frequency of it. Would it be sitting straight in stillness, walking, eating, breathing, sleeping or in death.

Life is so short, so why not also learn to use to explore lucidity in sleep? We do spend about a third of our lives in that state. An interesting approach on that level is Dream Yoga. Norbu in his book Dream Yoga and the practice of Natural Light gives some nice indications about it.

Regards,