Here is the New York Times obituary of John D. Rockefeller; a historical document that is slightly difficult to read, yet it contains many invaluable insights. Similar to Benjamin Franklin or Warren Buffett, you can always find witticism and wisdom in Rockefeller's words:
http://graphics8.nytimes.com/
"One of the swiftest toboggans I know of is for a young man just starting in life to get into debt."