From Ray Ortlund:
“Christ redeemed us from the curse of the law by becoming a curse for us.” Galatians 3:13
What is the curse of the law? It is the or-else-ness of the law: “Do this, or else.” Christ took the or-else-ness of the law onto himself at the cross, so that there is no more or-else for anyone in Christ, as God looks upon us now. Or-else is gone forever from your relationship with God.
“We, being delivered from these everlasting terrors and anguish through Christ, shall enjoy an everlasting and inestimable peace and happiness.”
Martin Luther, commentary on Galatians 3:13.