Send a Quote Enter a brief message. SendOk2 “We are what we repeatedly do. Excellence then is not an act but a habit” ~ Aristotle (384-322 BC) Greek philosopherSource: Misattributed to Aristotle. Actually a quote from Will Durant in The Story of Philosophy: The Lives and Opinions of the World's Greatest Philosophers (1926), Ch. II: Aristotle and Greek Science; part VII: Ethics and the Nature of Happiness. The misattribution is from taking Durant's summation of Aristotle's ideas as being the words of Aristotle himself.http://quotes.liberty-tree.ca/quote_blog/Will.Durant.Quote.FF00