Peter Matthiessen said this quote
“ It is as if I have entered what the Tibetans call the Bardo-literally, between-two-existences- a dreamlike hallucination that precedes reincarnation, not necessarily in human form…In case I should need them, instructions for passage through the Bardo are contained in the Tibetan book of the dead- a guide for the living since it teaches that a man’s last thoughts will determine the quality of his reincarnation. ”