In Order To Improve The Mind, We

The Only Thing That I Know, Is That I Know Nothing

The Only Secure Knowledge Is That I Exist.

The Nature Of Matter, Or Body Considered In General, Consists Not In Its Being Something Which Is Hard Or Heavy Or Coloured, Or Which Affects The Senses In Any Way, But Simply In Its Being Something Which Is Extended In Length, Breadth And Depth.

I Am Indeed Amazed When I Consider How Weak My Mind Is And How Prone To Error.

Common Sense Is The Most Fairly Distributed Thing In The World, For Each One Thinks He Is So Well-endowed With It That Even Those Who Are Hardest To Satisfy In All Other Matters Are Not In The Habit Of Desiring More Of It Than They Already Have.