Doctrine from the Psalms?

This past Sunday in Sunday School, we men were in Psalms 51. This is the Psalm that King David of Israel wrote after his sin with Bathsheba and the ensuing sin that followed.
As we were reviewing the Psalm and talking about how sin effects our lives, two different thoughts were on my heart.
Confess Your Faults
The first is one that I’ve wrestled with on multiple occasions—that of the question of the facade that most Christians wear. I’m sure that any good student of “the Book” would be able to answer the following question right, but do they live that way?
What is the status of believers: Are they perfect, or still sinners?
