There are three kinds of objects of belief. Some are always believed and never understood, such as all history, which runs through temporal and human acts. Others must be understood to be believed, such as all human reasonings. Thirdly, there are those which must be believed first and understood later, like divine matters.
- Augustine of Hippo, Eighty-Three Different Questions (388–395/7), 48
http://en.wikiquote.org/wiki/Belief