Woodrow Wilson said that many years ago. You can find it and some other thought provoking quotes listed online at: http://www.susanbaughman.com/Famous-Quotes.asp
Originally I ran across it in the "Complete Guide to Informational Interviewing and Networking" by the University of Houston:
Quotations can provide ideas for talks or just punch lines. Remember that you usually don't have to reinvent the wheel, just to borrow a hubcap or two. Bartelby.com is a great online source for quotations: http://www.bartleby.com/quotations/
Some quotations are deeply embedded in our language. For example, "For fools rush in where angels fear to tread" comes from the English poet Alexander Pope. Johnny Mercer has used just three words "fools rush in" for the title of a song in 1940. Those words also are the title of a romantic comedy movie from 1997 starring Salma Hayek and Matthew Perry.