It Is A Precarious Undertaking To Say

If One Holds These High Principles Clearly Before One's Eyes, And Compares Them With The Life And Spirit Of Our Times, Then It Appears Glaringly That Civilized Mankind Finds Itself At Present In Grave Danger. In The Totalitarian States It Is The Rulers Themselves Who Strive Actually To Destroy That Spirit Of Humanity. In Less Threatened Parts It Is Nationalism And Intolerance, As Well As The Oppression Of The Individuals By Economic Means, Which Threaten To Choke These Most Precious Traditions.

The Supreme Goal Of All Theory Is To Make The Irreducible Basic Elements As Simple And As Few As Possible Without Having To Surrender The Adequate Representation Of A Simple Datum Of Experience.

If You're Not Sure Why You're Doing Something, You Can Never Do Enough Of It. Imagination Is More Important Than Knowledge.

As Far As The Laws Of Mathematics Refer To Reality, They Are Not Certain, And As Far As They Are Certain, They Do Not Refer To Reality.

It Is The Theory That Decides What Can Be Observed.