A Rationalist Is Simply Someone For Whom

[the Aim Of Science Is] To Explain What So Far Has Taken To Be An Explicans, Such As A Law Of Nature. The Task Of Empirical Science Constantly Renews Itself. We May Go On Forever, Proceeding To Explanations Of A Higher And Higher Universality.

Aestheticism And Radicalism Must Lead Us To Jettison Reason, And To Replace It By A Desperate Hope For Political Miracles. This Irrational Attitude Which Springs From Intoxication With Dreams Of A Beautiful World Is What I Call Romanticism. It May Seek Its Heavenly City In The Past Or In The Future; It May Preach 'back To Nature' Or 'forward To A World Of Love And Beauty'; But Its Appeal Is Always To Our Emotions Rather Than To Reason. Even With The Best Intentions Of Making Heaven On Earth It Only Succeeds In Making It A Hell - That Hell Which Man Alone Prepares For His Fellow-men.

There Will Be Well-testable Theories, Hardly Testable Theories, And Non-testable Theories. Those Which Are Non-testable Are Of No Interest To Empirical Scientists. They May Be Described As Metaphysical.

We Hate The Very Idea That Our Own Ideas May Be Mistaken, So We Cling Dogmatically To Our Conjectures.

Rationalism Is An Attitude Of Readiness To Listen To Contrary Arguments And To Learn From Experience... Of Admitting That "i May Be Wrong And You May Be Right And, By An Effort, We May Get Nearer The Truth."