Date: 1761

"It is not the soft power of humanity, it is not that feeble spark of benevolence which Nature has lighted up in the human heart, that is thus capable of counteracting the strongest impluses of self-love."

— Smith, Adam (1723-1790)

Date: 1783

"Although there may be some few exceptions, yet in general it holds, that when the bent of the mind is wholly directed towards some one object, exclusive, in a manner, of others, there is the fairest prospect of eminence in that, whatever it be. The rays must converge to a point, in order to glow...

— Blair, Hugh (1718-1800)

Date: 1785

"When we come to be instructed by Philosophers, we must bring the old light of common sense along with us, and by it judge of the new light which the Philosopher communicates to us."

— Reid, Thomas (1710-1796)