Date: 1740

"But notwithstanding the empire of the imagination, there is a secret tie or union among particular ideas, which causes the mind to conjoin them more frequently together, and makes the one, upon its appearance, introduce the other."

— Hume, David (1711-1776)

Date: 1742

" But what supreme joy in the victories over vice as well as misery, when, by virtuous example or wise exhortation, our fellow-creatures are taught to govern their passions, reform their vices, and subdue their worst enemies, which inhabit within their own bosoms?"

— Hume, David (1711-1776)

Date: 1744

"That is to say, we think there is no Way hitherto laid down for preserving the Vigour of the Body, and thereby securing such a Supply of animal Spirits as may support the Dominion of the Soul in its full Extent and Activity, so feasible as this, which is suggested to be the Source of the Longevi...

— Campbell, John (1708-75)