William Makepeace Thackeray (1811-1863) English novelist
(Attributed)
Attributed in Laurence Hutton, "A Boy I Knew," St Nicholas Magazine (Mar 1897), where it was originally given as "Whatever you are, try to be a good one." Often attributed to Abraham Lincoln (first recorded in 1946). For more information, see here.
There is always some kid who may be seeing me for the first or last time. I owe him my best.
Joe DiMaggio (1914-1999) American baseball player [b. Giuseppe Paolo DiMaggio, nicknamed "Joltin' Joe" and "The Yankee Clipper"] The Sporting News (4 Apr 1951)
When asked why he hustled on even a play that wouldn't affect the outcome of the game or his team's standing.