Joshua 3:8

And thou shalt command the priests that bear the Ark of the Covenant, saying, When ye are come to the brink of the water of Jordan, the eastern bank or slope of the river, as it descended to the bed of the stream, ye shall stand still in Jordan, thus forming, as it were, a dam to hold back the waters rushing down from the north. The Ark of the Covenant here appears as the emblem of God's almighty presence. To this day God has bound His children to the use of certain means of grace, the Word and the Sacraments. Where these are administered, there the true, living God is present, there we find evidences of God's power and mercy, of His protection and blessing.