A Mathematical Equation Stands Forever.

Love Is A Better Teacher Than Duty.

I Don't Believe In Mathematics.

For Any One Who Is Pervaded With The Sense Of Causal Law In All That Happens, Who Accepts In Real Earnest The Assumption Of Causality, The Idea Of A Being Who Interferes With The Sequence Of Events In The World Is Absolutely Impossible. Neither The Religion Of Fear Nor The Social-moral Religion Can Have Any Hold On Him.

I Don't Try To Imagine A Personal God; It Suffices To Stand In Awe At The Structure Of The World, Insofar As It Allows Our Inadequate Senses To Appreciate It.

Matter Is Real To My Senses, But They Aren't Trustworthy. If Galileo Or Copernicus Had Accepted What They Saw, They Would Never Have Discovered The Movement Of The Earth And Planets.