“Between the “micrographs” of cerebrial ganglia and the photo-scenographic galleries of the astral light, a current is established. And a man who knows that he has never visited in body, nor seen the landscape and person that he recognizes may well assert that still has he seen and knows them, for the acquaintance was formed while traveling in “spirit”.
To this the physiologists can have but one objection. They will answer that in natural sleep – perfect and deep, “half of our nature which is volitional is in the condition of inertia”; hence unable to travel; the more so as the existence of any such individual astral body or soul is considered by them little else than a poetical myth.
Blumenbach assures us that in the state of sleep, all intercourse between mind and body is suspended; an assertion which is denied by Dr. Richardson, F. R. S., who honestly reminds the German scientist that “the precise limits and connections of mind and body being unknown” it is more than should be said.
This confession, added to those of the French physiologist, Fournie, and the still more recent one of Dr. Allchin, an eminent London physician, who frankly avowed, in an address to students, that “of all scientific pursuits which practically concern the community, there is none perhaps which rests upon so uncertain and insecure a basis as medicine”, gives us a certain right to offset the hypothesis of ancient scientists against those of the modern ones.”
H. P. Blavatsky