Salt was the opposite of leaven. Salt was always to be added to the sacrifice, but never leaven. Salt represented purity and preservation, but leaven represented impurity and sin. Salt was a sign of God’s eternal covenant. It was even mentioned as a sign of the eternal covenant God made with David that the throne belonged to his descendants forever (2 Chron. 13:5). In the Sermon on the Mount, Jesus told His disciples that they were the “salt of the earth” (Matt. 5:13). We are to be agents of Christ in this world, representing His gospel to the nations.