"Any man who is under 30, and is not a liberal, has not heart; and any man who is over 30, and is not a conservative, has no brains." (Sir Winston Churchill, 1874-1965)

"If you're not a liberal when you're 25, you have no heart. If you're not a conservative by the time you're 35, you have no brain." There is no record of anyone hearing Churchill say this. Paul Addison of Edinburgh University makes this comment: "Surely Churchill can't have used the words attributed to him. He'd been a Conservative at 15 and a Liberal at 35! And would he have talked so disrespectfully of Clemmie, who is generally thought to have been a lifelong Liberal?"

According to research by Mark T. Shirey, citing Nice Guys Finish Seventh: False Phrases, Spurious Sayings, and Familiar Misquotations by Ralph Keyes, 1992, this quote was first uttered by mid-nineteenth century French historian and statesman François Guizot when he observed, Not to be a republican at 20 is proof of want of heart; to be one at 30 is proof of want of head. (N'être pas républicain à vingt ans est preuve d'un manque de cœur ; l'être après trente ans est preuve d'un manque de tête.) This quote has been attributed variously to George Bernard Shaw, Benjamin Disraeli, Otto von Bismarck, and others.