Joshua said in 3:13 “the Lord of all the earth shall...” The Lord would separate the waters to allow Israel to cross the Jordan into Canaan, the victorious Christian life. The key here is that he was not just called the Lord of Israel, but the Lord of all the earth. Before he would divide Jordan for Israel to walk over the Jordan on dry ground they would first need to be sanctified. Their sanctification would come through the power of the Lord.