Also notice that Franklin thanks God for helping him to lead a good life. Franklin does not often show a religious side, and he will explain in greater depth later on that he is a Deist, or one who believes in a usually non-interventionist God without ascribing to any particular religious denomination. We are perhaps to believe that Franklin assumes either a false humility at the beginning of the book or that he grew in faith in his later years.
http://www.sparknotes.com/lit/franklinautobio/section1.html
Thanks for the link! Franklin's autobiography is one of the books I've always wanted, but never got around to buying. I think I'll print off a chapter or two.
Franklin did everything his own way :-).