No Man Is Rich Who Is Unsatisfied,

When A Scientist Doesn't Know The Answer To A Problem, He Is Ignorant. When He Has A Hunch As To What The Result Is, He Is Uncertain. And When He Is Pretty Darn Sure Of What The Result Is Going To Be, He Is In Some Doubt.

The Fact That You Are Not Sure Means That It Is Possible That There Is Another Way Someday.

That Is The Logical Tight-rope On Which We Have To Walk If We Wish To Interpret Nature.

If All Of Mathematics Disappeared, Physics Would Be Set Back By Exactly One Week.

If I Say [electrons] Behave Like Particles I Give The Wrong Impression; Also If I Say They Behave Like Waves. They Behave In Their Own Inimitable Way, Which Technically Could Be Called A Quantum Mechanical Way. They Behave In A Way That Is Like Nothing That You Have Seen Before.