"If the power of the conscious mind is raised to such a pitch that creation by it is possible, the
potential power of the subconscious mind should not be ignored. But the Krells, I am sure, ignored
it. – The result? The letting loose, upon an unsuspecting and defenseless race of beings,
a horde of dread and insensate monsters! The most frightful monsters of all – the realized
baseness of their own natures!" - Forbidden Planet (the book)