Date: 1807

"The formalism of such a 'Philosophy of Nature' teaches, say, that the Understanding is Electricity, or the Animal is Nitrogen, or that they are the equivalent of the South or North Pole, etc., or represent it."

— Hegel, G. W. F. (1770-1831)

Date: 1817

Mackintosh, following Hobbes and Hartley, analogizes mind and matter: "the law of association being that to the mind, which gravitation is to matter. "

— Coleridge, Samuel Taylor (1772-1834)

Date: 1817

"Let us cross-examine Hartley's scheme under the guidance of this distinction; and we shall discover, that contemporaneity, (Leibnitz's Lex Continui) is the limit and condition of the laws of mind, itself being rather a law of matter, at least of phaenomena considered as material. At the utmost, ...

— Coleridge, Samuel Taylor (1772-1834)

Date: 1805-6, published 1833-6

"It would make no difference if there had been no Reason there, just as with physicists it is a matter of perfect indifference whether, for instance, there is such a thing as magnetism or not."

— Hegel, G. W. F. (1770-1831)

Date: August 31, 1837

"But he, in his private observatory, cataloguing obscure and nebulous stars of the human mind, which as yet no man has thought of as such, — watching days and months, sometimes, for a few facts; correcting still his old records; — must relinquish display and immediate fame."

— Emerson, Ralph Waldo (1803-1882)