Rousseau Was Mad But Influential; Hume Was

I Know With Certainty, That [an Honest Man] Is Not To Put His Hand Into The Fire, And Hold It There, Till It Be Consumed: And Thisevent, I Think I Can Foretell With The Same Assurance, As That, If He Throw Himself Out At The Window, And Meet With No Obstruction, He Will Not Remain A Moment Suspended In The Air.

These Arguments On Each Side (and Many More Might Be Produced) Are So Plausible, That I Am Apt To Suspect, They May, The One As Well As The Other, Be Solid And Satisfactory, And That Reason And Sentiment Concur In Almost All Moral Determinations And Conclusions.

Grief And Disappointment Give Rise To Anger, Anger To Envy, Envy To Malice, And Malice To Grief Again, Till The Whole Circle Be Completed.

It Is A Great Mortification To The Vanity Of Man, That His Utmost Art And Industry Can Never Equal The Meanest Of Nature's Productions, Either For Beauty Or Value. Art Is Only The Under-workman, And Is Employed To Give A Few Strokes Of Embellishment To Those Pieces, Which Come From The Hand Of The Master.

To Invent Without Scruple A New Principle To Every New Phenomenon, Instead Of Adapting It To The Old; To Overload Our Hypothesis With A Variety Of This Kind, Are Certain Proofs That None Of These Principles Is The Just One, And That We Only Desire, By A Number Of Falsehoods, To Cover Our Ignorance Of The Truth.