“Why so many sermons on Old Testament?”

Why do so many churches major in the Old Testament most of the year? Can you explain the difference between the pattern (flesh) and the power (sin)? Am I breaking the Sabbath if I go to church on Sunday? Does God forgive us immediately after we ask Him each time we sin?

Tags: church, churches, flesh, forgiveness, Old Testament, once for all, sabbath, sermons, sin