Work out your salvation with fear and trembling?

Do we need to confess each sin to be forgiven? What about James 5:16 and confessing to one another? How do we “work out our salvation” and why does Paul say “with fear and trembling”? Does God pre-select some people for salvation leaving others with no chance to believe?

Tags: Catholicism, confession, election, fear, finished work, forgiveness, James 5:16, predestination, priest, salvation, trembling, work out