Confession is knowing down deep in your heart that something that you did was wrong. In order to feel cleansed inside, we need to confess any wrong doing. Without confessing our sins to God we can not be forgivien. If we stop confessing our sins then the death of Christ was for nothing. A sacrafice needed to be made when Adam and Eve disobeyed God, so instead of killing one of them an animal had to be the one who had to pay the price. That's why in the bible it talks about unclean and clean animals. Christ's blood had to be shed because He was without sin. If it wasn't for His death, could you image where the world would be like today, still looking for that Messiah.