Beg pardon, but Paul taught perhaps the deepest of meanings from the Bible. Specifically, his in-depth teaching about "the law" is that the laws of the OT convict the soul of the sinner, as no man except Christ could fulfill the law. Paul then teaches that Christ's birth, life, death and resurrection are the fulfillment of the law for the purpose of God providing us with His Grace, in that whoever shall confess their sins, repent of them and believe in Jesus the Christ should not perish, but have eternal life.
IF YOU WANT TO BE SPECIFIC ABOUT IT. What I've written is the specific truth.