I Was Just More Stubborn And More

Striving For Peace And Preparing For War Are Incompatible With Each Other, And In Our Time More So Than Ever.

Do You Believe In Immortality? No, And One Life Is Enough For Me.

That's My Mathematician Who Examines Problems Which I Put Before Him And Checks Their Validity. You See, I Am Not Myself A Good Mathematician.

I Think We Have To Safeguard Ourselves Against People Who Are A Menace To Others, Quite Apart From What May Have Motivated Their Deeds.

The Theoretical Idea ... Does Not Arise Apart From And Independent Of Experience; Nor Can It Be Derived From Experience By A Purely Logical Procedure. It Is Produced By A Creative Act. Once A Theoretical Idea Has Been Acquired, One Does Well To Hold Fast To It Until It Leads To An Untenable Conclusion.