David Hume said,

"The truth springs from arguments among friends,"

and

"The life of man is of no greater importance to the universe than that of an oyster,"

and

"Beauty is no quality in things themselves: It exists merely in the mind which contemplates them; and each mind perceives a different beauty,"

and

"Reading and sauntering and lounging and dozing, which I call thinking, is my supreme happiness,"

and

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