Adam Clarke on Galatians 2:19

For I through the law am dead to the law - In consequence of properly considering the nature and requisitions of the law, I am dead to all hope and expectation of help or salvation from the law, and have been obliged to take refuge in the Gospel of Christ. Or, probably the word νομος, Law, is here put for a system of doctrine; as if he had said, I through the Gospel am dead to the law. The law itself is consigned to death, and another, the Gospel of Christ, is substituted in its stead. The law condemns to death, and I have embraced the Gospel that I might be saved from death, and live unto God.