Date: 1732

"Thoughts crowd on Thoughts, as Alps on Alps arise, / And Worlds of Wonder open to my Eyes."

— Mitchell, Joseph (c. 1684-1738)

Date: 1748, 1777

"Chaced from the open country, these robbers [i.e., superstitions] fly into the forest, and lie in wait to break in upon every unguarded avenue of the mind, and overwhelm it with religious fears and prejudices."

— Hume, David (1711-1776)

Date: 1776

"Hence the strange parade he makes with regions, and recesses, hollow caverns, and private seats, wastes, and wildernesses, fruitful and cultivated tracks, words which, though they have a precise meaning as applied to country, have no definite signification as applied to mind."

— Campbell, George (1719-1796)