“Failing to prepare is preparing to fail.”
John Wooden (1910–2010) American basketball coach
Wooden only repeated a common aphorism (e.g. Interview on Charlie Rose, reported by Bill Walton), which was already in circulation as early as the 1920s, when he was a youth. http://www.google.com/search?hl=en&tbs=bks%3A1%2Ccdr%3A1%2Ccd_min%3AJan+1_2+1900%2Ccd_max%3ADec+31_2+1930&q=%22fail+to+prepare%22+%22prepare+to+fail%22 <br class="br">Misattributed