In his Autobiography, Franklin explains that he felt he needed
to be a more moral person, so he set up a self-improvement plan based
on thirteen virtues of moral perfection. He practiced one virtue for a
week and then moved on to the next. Franklin created a little virtue book
for himself in which he took notes on his progress and evaluated his success.
He reports that he gave up on the plan after a time, but carried the little
book with him for many years.