”From my experience I cannot doubt but that man, when lost to terrestrial consciousness, is indeed sojourning in another and uncorporeal life of far different nature from the life we know, and of which only the slightest and most indistinct memories linger after waking. From those blurred and fragmentary memories we may infer much, yet prove little. We may guess that in dreams life, matter, and vitality, as the earth knows such things, are not necessarily constant; and that time and space do not exist as our waking selves comprehend them. Sometimes I believe that this less material life is our truer life, and that our vain presence on the terraqueous globe is itself the secondary or merely virtual phenomenon.” —Beyond the Wall of Sleep
"What do we know … of the world and the universe about us? Our means of receiving impressions are absurdly few, and our notions of surrounding objects infinitely narrow. We see things only as we are constructed to see them, and can gain no idea of their absolute nature. With five feeble senses we pretend to comprehend the boundlessly complex cosmos, yet other beings with wider, stronger, or different range of senses might not only see very differently the things we see, but might see and study whole worlds of matter, energy, and life which lie close at hand yet can never be detected with the senses we have."