The Bible of the Christians, like the Koran of the Moslems, never seems to consider that the spiritual experiences in the form of hallucinatory visions by prophet or devotee, reported therein, may, in the last analysis, not be real. But the Bardo Thodol is so sweeping in its assertions that it leaves its reader with the clear-cut impression that every vision, without any exception whatsoever, in which spiritual beings, gods or demons, or paradises or places of torment and purgation play a part, in a Bardo or any Bardo-like dream or ecstasy, is purely illusionary, being based up upon sangsaric phenomena.

- W. Y. Evans-Wentz