Full Idea
Knowing is the best kind of believing. Mere believing is a kind of botched knowing. In short, belief aims at knowledge (not just truth).
Gist of Idea
Belief aims at knowledge (rather than truth), and mere believing is a kind of botched knowing
Source
Timothy Williamson (Knowledge and its Limits [2000], §1.5)
Book Reference
Williamson,Timothy: 'Knowledge and its Limits' [OUP 2002], p.47
A Reaction
The difference between aiming at truth and aiming at knowledge has to be in the justificiation, so beliefs aim to be justified. Believers always aim at truth, but they can be strikingly relaxed about justification.