Date: 1751

"A weak motive makes some impression: but, in opposition to one more powerful, it has no effect to determine the mind. In the precise same manner, a small force will not overcome a great resistance; nor the weight of an ounce in one scale, counter-balance a pound in the other."

— Home, Henry, Lord Kames (1696-1782)

Date: 1757

"Since, therefore, the mind of man appears of so loose and unsteddy a contexture, that, even at present, when so many persons find an interest in continually employing on it the chissel and the hammer, yet are they not able to engrave theological tenets with any lasting impression; how much more ...

— Hume, David (1711-1776)

Date: 1770

"Why should not our judgments concerning truth be acknowledged to result from a bias impressed upon the mind by its Creator, as well as our desire of self-preservation, our love of society, our resentment of injury, our joy in the possession of good?"

— Beattie, James (1735-1803)