Belief involves the most uncompromising attention.
"The funny thing is that to me it's exactly the other way around. In my experience, it's belief that involves the most uncompromising attention to the nature of things of which you are capable. It's belief which demands that you dispense with illusion after illusion, while contemporary common sense requires continual, fluffy pretending."
Francis Spufford, Unapologetic, p. 7