What does the salt symbolize in the healing of the waters in 2 Kings 2?

The act of using salt to heal the waters signifies the judgment of God against sin and the necessity of atonement. Salt is used in the context of sacrifices in the Old Testament, representing purification and preservation. When Elisha cast salt into the bitter waters, it signifies how Christ's sacrifice serves as the ultimate judgment for sin, bringing about spiritual healing and life. Therefore, the healing of the waters is emblematic of how the sacrifice of Jesus not only satisfies God's justice but also allows for the abundant life that springs from Him, in a way that is irreversible and effective.