'Tis evident, that sympathy, or the communication of passions, takes place among animals, no less than among men. Fear, anger, courage and other affe… - David Hume

He is happy whose circumstances suit his temper, but he is more excellent who can suit his temper to his circumstance.

One that has well digested his knowledge both of books and men, has little enjoyment but in the company of a few select companions. He feels too sensibly, how much all the rest of mankind fall short of the notions which he has entertained. And, his affections being thus confined within a narrow circle, no wonder he carries them further than if they were more general and undistinguished. The gaiety and frolic of a bottle companion improves with him into a solid friendship; and the ardours of a youthful appetite become an elegant passion.

The whole is a riddle, an aenigma, an inexplicable mystery. Doubt, uncertainty, suspence of judgment appear the only result of our most accurate scrutiny, concerning this subject. But such is the frailty of human reason, and such the irresistible contagion of opinion, that even this deliberate doubt could scarcely be upheld; did we not enlarge our view, and opposing one species of superstition to another, set them a quarrelling; while we ourselves, during their fury and contention, happily make our escape, into the calm, though obscure, regions of philosophy.