From a summary of the Tibetan Book of the Dead by Stanislav Grof:
"In stage two, the bardo of Luminous Mind, the departed encounters the hallucinations resulting from the karma created during life. Unless highly developed, the individual will feel that they are still in the body. The departed then encounters various apparitions, the "peaceful" and "wrathful" deities, that are actually personifications of human feelings and that, to successfully achieve nirvana, the deceased must encounter unflinchingly. Only the most evolved individuals can skip the bardo experience altogether and transit directly into a paradise realm. Stage three, the bardo of rebirth, is the process of reincarnation."