Religion of Ignorance

A teacher friend noticed this quote:

“This will be the best security for maintaining our liberties. A nation of well-informed men who have been taught to know and prize the rights which God has given them cannot be enslaved. It is in the religion of ignorance that tyranny begins. ”

This is found on American History Central. I don’t recognize this, nor do I find it searching The Papers of Benjamin Franklin (online).

I’ve emailed the American History Channel email contact address to see if they have source information. I would appreciate any such information.