John D. Rockefeller was a fascinating man who lived a long and interesting life. Ron Chernow’s biography of him Titan is probably the best biography I’ve ever read, and I highly recommend it. Rockefeller wrote the following poem at the age of 86 to sum up his life.

I was early taught to work as well as play,
My life has been one long, happy holiday;
Full of work and full of play—
I dropped the worry on the way—
And God was good to me everyday.