If You Can't Say It Simply And

The Genuine Rationalist Does Not Think That He Or Anyone Else Is In Possession Of The Truth; Nor Does He Think That Mere Criticism As Such Helps Us Achieve New Ideas. But He Does Think That, In The Sphere Of Ideas, Only Critical Discussion Can Help Us Sort The Wheat From The Chaff.

It Is The Rule Which Says That The Other Rules Of Scientific Procedure Must Be Designed In Such A Way That They Do Not Protect Any Statement In Science Against Falsification.

All We Can Do Is Search For The Falsity Content In Our Best Theory.

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

The Defence Of Democracy Must Consist In Making Anti-democratic Experiences Too Costly For Those Who Try Them; Much More Costly Than A Democratic Compromise