"As soon as the priests who carry the ark of the LORD set foot in the Jordan, its waters flowing downstream will be cut off and stand up in a heap." (Joshua 3:13)
The time has come. Joshua tells the people to consecrate themselves because tomorrow the LORD will do amazing things. The ark of the covenant is to go before them into the Jordan, carried by the priests. They are to keep a thousand yards behind it so they can see the way to go, since they have not been this way before. God tells Joshua: today I will begin to exalt you in the eyes of all Israel, so they may know that I am with you as I was with Moses. As soon as the priests who carry the ark of the LORD set foot in the Jordan, its waters flowing downstream will be cut off and stand up in a heap.
The Jordan is in flood at harvest time. The moment the priests' feet touch the water, the flow stops and the people cross on dry ground. The miracle deliberately echoes the Red Sea crossing: the new generation receives its own Exodus moment. The Catechism identifies the Jordan crossing as a type of Baptism: as Israel passed through the water into the promised land, the baptised person passes through the water into the life of grace (CCC 1222). Every baptismal font is a Jordan, and every Baptism is a crossing into the inheritance.
Brothers and sisters, you have not been this way before. The road ahead is genuinely new, and the ark goes in front. The crossing requires that the priests put their feet in the water before it stops flowing. The miracle comes at the moment of committed movement, not before. Put your feet in. The waters will be cut off.
Lord God, as the priests' feet touched the Jordan the waters parted. Give us the courage to step into our floods before the path appears. You go before us in the ark of your presence. Through Christ our Lord. Amen.