Everything That Is Not Forbidden Is Compulsory.

What Is Especially Striking And Remarkable Is That In Fundamental Physics, A Beautiful Or Elegant Theory Is More Likely To Be Right Than A Theory That Is Inelegant. A Theory Appears To Be Beautiful Or Elegant (or Simple, If You Prefer) When It Can Be Expressed Concisely In Terms Of Mathematics We Already Have. Symmetry Exhibits The Simplicity. The Foundamental Law Is Such That The Different Skins Of The Onion Resemble One Another And Therefore The Math For One Skin Allows You To Express Beautifully And Simply The Phenomenon Of The Next Skin.

You Know, There Was A Time, Just Before I Started To Study Physical Science, When Astronomers Thought That Systems Such As We Have Here In The Solar System Required A Rare Triple Collision Of Stars

If We Look At The Way The Universe Behaves, Quantum Mechanics Gives Us Fundamental, Unavoidable Indeterminacy, So That Alternative Histories Of The Universe Can Be Assigned Probability.

The World Of The Quark Has Everything To Do With A Jaguar Circling In The Night.

If Someone Says That He Can Think Or Talk About Quantum Physics Without Becoming Dizzy, That Shows Only That He Has Not Understood Anything Whatever About It.