Date: January 1739

"I have already observed, in examining the foundation of mathematics, that the imagination, when set into any train of thinking, is apt to continue even when its object fails it, and, like a galley put in motion by the oars, carries on its course without any new impulse."

— Hume, David (1711-1776)

Date: 1741

"Two men travelling on the highway, the one east, the other west, can easily pass each other, if the way be broad enough: But two men, reasoning upon opposite principles of religion, cannot so easily pass, without shocking; though one should think, that the way were also, in that case, sufficient...

— Hume, David (1711-1776)

Date: 1742

"The mind naturally continues with the same impetus or force, which it has acquired by its motion; as a vessel, once impelled by the oars, carries on its course for some time, when the original impulse is suspended."

— Hume, David (1711-1776)

Date: 1748, 1777

"And while the body is confined to one planet, along which it creeps with pain and difficulty; the thought can in an instant transport us into the most distant regions of the universe; or even beyond the universe, into the unbounded chaos, where nature is supposed to lie in total confusion."

— Hume, David (1711-1776)

Date: 1751, 1777

"We may as well imagine, that minute wheels and springs, like those of a watch, give motion to a loaded wagon, as account for the origin of passion from such abstruse reflections."

— Hume, David (1711-1776)