Whenever A Theory Appears To You As

Whenever We Propose A Solution To A Problem, We Ought To Try As Hard As We Can To Overthrow Our Solution, Rather Than Defend It.

All Life Is Problem Solving

No Number Of Sightings Of White Swans Can Prove The Theory That All Swans Are White. The Sighting Of Just One Black One May Disprove It.

A Rationalist Is Simply Someone For Whom It Is More Important To Learn Than To Be Proved Right; Someone Who Is Willing To Learn From Others - Not By Simply Taking Over Another's Opinions, But By Gladly Allowing Others To Criticize His Ideas And By Gladly Criticizing The Ideas Of Others

Thus Science Must Begin With Myths, And With The Criticism Of Myths; Neither With The Collection Of Observations, Nor With The Invention Of Experiments, But With The Critical Discussion Of Myths, And Of Magical Techniques And Practices.