Do Not Grow Old, No

Make Everything As Simple As Possible, But Not Simpler.

We Should Be On Our Guard Not To Overestimate Science And Scientific Methods When It Is A Question Of Human Problems, And We Should Not Assume That Experts Are The Only Ones Who Have The Right To Express Themselves On Questions Affecting The Organization Of Society.

I Refuse To Engage In An Intellectual Battle With An Unarmed Man.

The High Destiny Of The Individual Is To Serve Rather Than To Rule.

How Can It Be That Mathematics, Being After All A Product Of Human Thought Which Is Independent Of Experience, Is So Admirably Appropriate To The Objects Of Reality?