The Gravity Is The First Thing Which

On The Left-hand Side Of The Field Equation We May Add The Fundamental Tensor Guv, Multiplied By A Universal Constant, -λ, At Present Unknown, Without Destroying The General Covariance.

You Imagine That I Look Back On My Life's Work With Calm Satisfaction. But From Nearby It Looks Quite Different. There Is Not A Single Concept Of Which I Am Convinced That It Will Stand Firm, And I Feel Uncertain Whether I Am In General On The Right Track.

Hope That Justice Will Be Done To Those Brave Men Who Stood Up For Their Convictions.

It Is Our American Habit If We Find The Foundations Of Our Educational Structure Unsatisfactory To Add Another Story Or Wing.

I Am Not A Positivist. Positivism States That What Cannot Be Observed Does Not Exist. This Conception Is Scientifically Indefensible, For It Is Impossible To Make Valid Affirmations Of What People 'can' Or 'cannot' Observe. One Would Have To Say 'only What We Observe Exists,' Which Is Obviously False.