Read the Tibetan book of death called Bardo Thodal. 'The Bardo Thodol teaches that once awareness is freed from the body, it creates its own reality as one would experience in a dream. This dream occurs in various phases (bardos) in ways both wonderful and terrifying. Overwhelming peaceful and wrathful visions and deities appear. Since the deceased's awareness is in confusion of no longer being connected to a physical body, it needs help and guidance in order that enlightenment and liberation occurs. The Bardo Thodol teaches how we can attain Nirvana by recognizing the heavenly realms instead of entering into the lower realms where the cycle of birth and rebirth continue.'