We Must Keep Our Freedom Of Mind,

A Great Discovery Is A Fact Whose Appearance In Science Gives Rise To Shining Ideas, Whose Light Dispels Many Obscurities And Shows Us New Paths.

Science Increases Our Power In Proportion As It Lowers Our Pride.

A Fact In Itself Is Nothing. It Is Valuable Only For The Idea Attached To It, Or For The Proof Which It Furnishes.

First Causes Are Outside The Realm Of Science.

We Must Never Make Experiments To Confirm Our Ideas, But Simply To Control Them.