Is the devil in the details?

You heard the term "The devils in the details"
Well some times no matter how many details you have or seen,
the devil bites you in the ***.

No i havent heard that term before. I really don't even get what it is saying, i'll google for some clarification though. unless you can explain it better :X

omg...
whats going on here?
ringo?...
are u ok?
I also did not heard about it, but i guess that it is a church terminology for really going for the books. searching mad for the asnwer of a needed question or action.
Or might be just to know how one can acomplish the Evil=good things trought the life by knowledge.
Humm