"The past is many things, but one thing it is, is irrevocable. A past to your liking is not an entitlement."

Thomas Sowell, Is Reality Optional?
 

"Few human acts are so difficult as to say mea culpa, to face facts when they conflict with long-held philosophical views. People will do so only when they suffer severe personal injury if they persist in error. That is why businessmen, who may be bankrupted if they refuse to face facts, are one of the few groups that develop the habit of doing so."

Milton Friedman’s Preface to William Simon A Time for Truth p. xiii.
 

"Leisure is a food, like sleep; liberty is a food, like sleep. Leisure is a matter of quality rather than quantity. Five minutes lasts longer when one cannot be disturbed than five hours when one maybe disturbed."

G.K. Chesterton "On Holidays", in New Witness May 21, 1914, quoted in Gilbert Magazine Vol. 11 #7 (June/08)

"The two distinctive doctrines of Christianity are Original Sin and Salvation, the very bad news that no one else dares tell us and the very good news that no one else has a right to tell us."

Peter Kreeft Christianity for Modern Pagans: Pascal’s Pensées Edited, Outlined & Explained

"On the other hand, you have different fingers."

E-mailed by Lorne Gunter; I do not know if it is original with him

"There is too much tendency to turn your life into an essay. I propose to make mine a story."

G.K. Chesterton in "Notebook" while in art school, quoted in Garry Wills Chesterton 

"Strangely coinciding with human beings' ability to cooperate is our tendency to be extremely aggressive."

MSNBC Science June 5, 20125/6/12.

"This… is what is meant today by being broadminded: living on prejudices and never looking at them."

G.K. Chesterton in Illustrated London News May 5, 1928, quoted in Gilbert Magazine Vol. 9 #6 p. 18.