Any Belief Worth Having Must Survive Doubt

If History Repeats Itself, And The Unexpected Always Happens, How Incapable Must Man Be Of Learning From Experience.

Use Your Health, Even To The Point Of Wearing It Out. That Is What It Is For. Spend All You Have Before You Die; Do Not Outlive Yourself.

I Don't Know If There Are Men On The Moon, But If There Are They Must Be Using The Earth As Their Lunatic Asylum

Consistency Is The Enemy Of Enterprise, Just As Symmetry Is The Enemy Of Art.

Life Is No Brief Candle To Me. It Is A Sort Of Splendid Torch Which I Have Got A Hold Of For The Moment, And I Want To Make It Burn As Brightly As Possible Before Handing It On To Future Generations.