Human Nature Is The Only Science Of

We Have No Other Notion Of Cause And Effect, But That Of Certain Objects, Which Have Always Conjoin'd Together, And Which In All Past Instances Have Been Found Inseparable. We Cannot Penetrate Into The Reason Of The Conjunction. We Only Observe The Thing Itself, And Always Find That From The Constant Conjunction The Objects Acquire An Union In The Imagination.

Such A Superiority Do The Pursuits Of Literature Possess Above Every Other Occupation, That Even He Who Attains But A Mediocrity In Them, Merits The Pre-eminence Above Those That Excel The Most In The Common And Vulgar Professions.

All That Belongs To Human Understanding, In This Deep Ignorance And Obscurity, Is To Be Sceptical, Or At Least Cautious, And Not To Admit Of Any Hypothesis Whatever, Much Less Of Any Which Is Supported By No Appearance Of Probability.

If We Take In Our Hand Any Volume; Of Divinity Or School Metaphysics, For Instance; Let Us Ask, Does It Contain Any Abstract Reasoning Concerning Quantity Or Number? No. Does It Contain Any Experimental Reasoning Concerning Matter Of Fact And Existence? No. Commit It Then To The Flames: For It Can Contain Nothing But Sophistry And Illusion.

..all Arguments Concerning Existence Are Founded On The Relation Of Cause And Effect; That Our Knowledge Of That Relation Is Derived Entirely From Experience; And All Our Experimental Conclusions Proceed Upon The Supposition That The Future Will Be Conformable To The Past. .... Without The Influence Of Custom, We Should Be Entirely Ignorant Of Every Matter Of Fact Beyond What Is Immediately Present To The Memory And Senses.