From 2007, Arthur Krystal on Jacques Barzun:

Next month, Barzun, the eminent historian and cultural critic, will turn one hundred. His idea of celebrating his centenary is to put the finishing touches on his thirty-eighth book (not counting translations). Among his areas of expertise are French and German literature, music, education, ghost stories, detective fiction, language, and etymology. Barzun has examined Poe as proofreader, Abraham Lincoln as stylist, Diderot as satirist, and Liszt as reader; he has burnished the reputations of Thomas Beddoes, James Agate, and John Jay Chapman; and he has written so many reviews and essays that his official biographer is loath to put a number on them. There’s nothing hasty or haphazard about these evaluations. Barzun’s breadth of erudition has been a byword among friends and colleagues for six decades. Yet, in spite of his degrees and awards (he was made a Chevalier de l’Ordre National de la Légion d’Honneur and has received the Presidential Medal of Freedom), Barzun regards himself in many respects as an “amateur” (the Latin root, amator, means “lover”), someone who takes genuine pleasure in what he learns about. More than any other historian of the past four generations, Barzun has stood for the seemingly contradictory ideas of scholarly rigor and unaffected enthusiasm.