No Paradox, No Progress.

Your Theory Is Crazy, But It's Not Crazy Enough To Be True.

If Anybody Says He Can Think About Quantum Physics Without Getting Giddy, That Only Shows He Has Not Understood The First Thing About Them.

A Visitor To Niels Bohr's Country Cottage, Noticing A Horseshoe Hanging On The Wall, Teasing The Eminent Scientist About This Ancient Superstition. "can It Be True That You, Of All People, Believe It Will Bring You Luck?' 'of Course Not,' Replied Bohr, 'but I Understand It Brings You Luck Whether You Believe It Or Not.'

Einstein, Stop Telling God What To Do!

Truth Is Something That We Can Attempt To Doubt, And Then Perhaps, After Much Exertion, Discover That Part Of The Doubt Is Not Justified.