X + Y + Z X Is

It Is Difficult Even To Attach A Precise Meaning To The Term "scientific Truth." So Different Is The Meaning Of The Word "truth" According To Whether We Are Dealing With A Fact Of Experience, A Mathematical Proposition Or A Scientific Theory. "religious Truth" Conveys Nothing Clear To Me At All.

Never Let Yourself Be Seduced By Any Problem, No Matter How Difficult.

It Is Always Delightful When A Great And Beautiful Idea Proves To Be Consonant With Reality.

Capitalism Has Brought With It Progress, Not Merely In Production But Also In Knowledge.

In Theory, Theory And Practice Are The Same. In Practice, They Are Not.