And Thereby Make Ourselves, As It Were,

An Optimist May See A Light Where There Is None, But Why Must The Pessimist Always Run To Blow It Out?

If I Found Any New Truths In The Sciences, I Can Say That They Follow From, Or Depend On, Five Or Six Principal Problems Which I Succeeded In Solving And Which I Regard As So Many Battles Where The Fortunes Of War Were On My Side.

Perfect Numbers Like Perfect Men Are Very Rare.

A Person Has Two Passions For Love And Abhorrence. A Big Disposition To Excessiveness Has Just A Love, Because It Is More Ardent And Stronger.

I Know That I Exist; The Question Is, What Is This 'i' That 'i' Know.