What Is The Essence Of Life? To

That Which Is Common To The Greatest Number Has The Least Care Bestowed Upon It. Every One Thinks Chiefly Of His Own, Hardly At All Of The Common Interest; And Only When He Is Himself Concerned As An Individual. For Besides Other Considerations, Everybody Is More Inclined To Neglect The Duty Which He Expects Another To Fulfill.

Think As Wise Men Do, But Speak As The Common People Do.

In The Case Of Some People, Not Even If We Had The Most Accurate Scientific Knowledge, Would It Be Easy To Persuade Them Were We To Address Them Through The Medium Of That Knowledge; For A Scientific Discourse, It Is The Privilege Of Education To Appreciate, And It Is Impossible That This Should Extend To The Multitude.

Purpose Is A Desire For Something In Our Own Power, Coupled With An Investigation Into Its Means.

It Is Possible To Fail In Many Ways...while To Succeed Is Possible Only In One Way.