✅✅✅has stated it, reasoned about it, and finally either established its authority or disproved it utterly10 through the discovery of the real thing he was seeking. Either result was progress, because man grows, as Browning says, “through catching11 at mistake as midway help, till he reach fact indeed.” So there is no need to be disturbed by the conflicting opinions of men of science touching12 the purpose or method of sleep.
Even the rejected theories have added to the sum of our knowledge, and the field for investigation13 is still open to all who are faithful in noting and comparing the manifestations14 of Nature, which the scientists call phenomena15.✅