Science Rejects The Indeterminate.

We Must Keep Our Freedom Of Mind, ... And Must Believe That In Nature What Is Absurd, According To Our Theories, Is Not Always Impossible.

Art Is 'i'; Science Is 'we'.

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

It Has Often Been Said That, To Make Discoveries, One Must Be Ignorant. This Opinion, Mistaken In Itself, Nevertheless Conceals A Truth. It Means That It Is Better To Know Nothing Than To Keep In Mind Fixed Ideas Based On Theories Whose Confirmation We Constantly Seek, Neglecting Meanwhile Everything That Fails To Agree With Them.

It Is Impossible To Devise An Experiment Without A Preconceived Idea; Devising An Experiment, We Said, Is Putting A Question; We Never Conceive A Question Without An Idea Which Invites An Answer. I Consider It, Therefore, An Absolute Principle That Experiments Must Always Be Devised In View Of A Preconceived Idea, No Matter If The Idea Be Not Very Clear Nor Very Well Defined.