Paul reminds the Galatians that Jesus not only died for our sins, granted us His righteousness, but also redeemed us from the curse of law:
"Christ hath redeemed us from the curse of the law, being made a curse for us: for it is written, Cursed is every one that hangeth on a tree: 14That the blessing of Abraham might come on the Gentiles through Jesus Christ; that we might receive the promise of the Spirit through faith." (Galatians 3: 13-14)
Yet notice also that a man must not remain hanging on the tree.
He must be brought down, so that the land would not be defiled.
Jesus was brought down from the Cross, signalling to the world that all the punishment for our sins was fully paid:
"I have glorified thee on the earth: I have finished the work which thou gavest me to do." (John 17: 4)
"When Jesus therefore had received the vinegar, he said, It is finished: and he bowed his head, and gave up the ghost." (John 19: 30)
Of course, let us never forget that Jesus did no sin (1 Peter 2: 22).
Yet He became sin, that we might be made the righteousness of God in Him (2 Corinthians 5: 21)
Jesus was cursed, that we would be blessed. He was brought down from the tree, and thus our path, our walk is not defiled.