"The narrowest hinge on my hand puts to scorn all machinery."

Walt Whitman, quoted in John Stewart Collis, Living With A Stranger: A Discourse on the Human Body

"As heretical as it may seem to institution-bound historians, the study of history has essentially been a self-help project."

James Dale Davidson and William Rees-Mogg in The Great Reckoning 

"The Law of Supply and Demand. As inexorable as the Law of Gravity, even governments cannot break it, although they often try."

William Trench in Only You Can Save Canada

 "I may be dumb, but I’m not stupid."

Terry Bradshaw, quoted in Gilbert! magazine Jan.-Feb. 2002

William "Blake could do so many things. Why is it that he could do none of them quite right?"

G.K. Chesterton, quoted by Dale Ahlquist in Gilbert! magazine Vol. 5 # 3 (December 2001)

"If men are so wicked with religion, what would they be if without it?"

Benjamin Franklin to Thomas Paine, date unknown, according to The Patriot Post Founders’ Quote Daily March 24, 2008 from Federalist.com

"It’s kind of like an elephant in a bathtub: If you don’t see it at first glance, chances are you never will."

Sen. Fred Thompson quoted by Jay Nordlinger in National Review May 17, 1999 [as it happens I don't agree with the point Thompson was making but it's a great metaphor] 

"If Your Life Was a Business, Would You Invest in It?"

The title of a book by John Eckblad and David Kiel, mentioned by Susan Riley in Ottawa Citizen Dec. 15, 2004