The corresponding letter to this chapter is Dalet- door;way
In this chapter we have the nation of Israel entering the Promised Land.
Y’hoshua 4:1-3 Now it came about when all the nation had finished crossing the Jordan, that the L-RD spoke to Y’hoshua, saying, "Take for yourselves twelve men from the people, one man from each tribe, and command them, saying,' Take up for yourselves twelve stones from here out of the middle of the Jordan, from the place where the priests' feet are standing firm, and carry them over with you, and lay them down in the lodging place where you will lodge tonight.' "
Here the L-rd tells Y’hoshua to take twelve men. Yeshua also would choose twelve men to help him in his journey.
Mark 3:14-19 And He appointed twelve, that they might be with Him, and that He might send them out to preach, and to have authority to cast out the demons. And He appointed the twelve: Shim’on (Simon) (to whom He gave the name Kefa (Peter)), and Ya’akov (James), Ben-Zavdai (the son of Zebedee), and Yochanan (John) the brother of Ya’akov (James) (to them He gave the name B’nei-Regesh (Boanerges), which means, "Sons of Thunder"); and Andrew, and Philip, and Bar-Talmai (Bartholomew), and Mattityahu (Matthew), and T’oma (Thomas), and Ya’akov (James) Ben-Halfai (the son of Alphaeus), and Taddai (Thaddaeus), and Shim’on (Simon) the Zealot; and Y’hudah (Judas) from K’riot (Iscariot), who also betrayed Him.
Y’hoshua 4:4-7 So Y’hoshua called the twelve men whom he had appointed from the sons of Israel, one man from each tribe; and Y’hoshua said to them, "Cross again to the ark of the L-RD your G-d into the middle of the Jordan, and each of you take up a stone on his shoulder, according to the number of the tribes of the sons of Israel. Let this be a sign among you, so that when your children ask later, saying, 'What do these stones mean to you?' then you shall say to them,' Because the waters of the Jordan were cut off before the ark of the covenant of the L-RD; when it crossed the Jordan, the waters of the Jordan were cut off.' So these stones shall become a memorial to the sons of Israel forever. "
Two pillars were set up: One in the middle of the river where G-d parted the river and the other on dry ground where the Israelites first camped in Gilgal.
Y’hoshua 4:8-9 And thus the sons of Israel did, as Joshua commanded, and took up twelve stones from the middle of the Jordan, just as the L-RD spoke to Y’hoshua, according to the number of the tribes of the sons of Israel; and they carried them over with them to the lodging place, and put them down there. Then Y’hoshua set up twelve stones in the middle of the Jordan at the place where the feet of the priests who carried the Ark of the Covenant were standing, and they are there to this day.
Sometimes stones are used to commemorate when G-d does something special in your life. In the future, we will be each be given a stone and a special name.
Revelation 2:17 'He who has an ear, let him hear what the Spirit says to the churches. To him who overcomes, to him I will give some of the hidden manna, and I will give him a white stone, and a new name written on the stone which no one knows but he who receives it.'
Y’hoshua 4:10-14 For the priests who carried the ark were standing in the middle of the Jordan until everything was completed that the L-RD had commanded Y’hoshua to speak to the people, according to all that Moshe had commanded Y’hoshua. And the people hurried and crossed; and it came about when all the people had finished crossing, that the ark of the L-RD and the priests crossed before the people. And the sons of Reuben and the sons of Gad and the half-tribe of Manasseh crossed over in battle array before the sons of Israel, just as Moshe had spoken to them; about 40,000, equipped for war, crossed for battle before the L-RD to the desert plains of Jericho. On that day the L-RD exalted Y’hoshua in the sight of all Israel; so that they revered him, just as they had revered Moshe all the days of his life.
The tribes of Reuben, Gad, and half of Manasseh stayed on the eastern side of the Jordan River. They sent their warriors across the Jordan to help their brothers conquer the land.
Y’hoshua 4:15-18 Now the L-RD said to Y’hoshua, "Command the priests who carry the ark of the testimony that they come up from the Jordan." So Y’hoshua commanded the priests, saying, "Come up from the Jordan." And it came about when the priests who carried the ark of the covenant of the L-RD had come up from the middle of the Jordan, and the soles of the priests' feet were lifted up to the dry ground, that the waters of the Jordan returned to their place, and went over all its banks as before.
Remember the Ruach HaKodesh dwelt above the Mercy Seat (Lid of the Ark). So G-d himself was in the midst of the river holding back the waters. As soon as they left the riverbed the waters flood back in to refill the river basin.
Y’hoshua 4:19-24 Now the people came up from the Jordan on the tenth of the first month and camped at Gilgal on the eastern edge of Jericho. And those twelve stones which they had taken from the Jordan, Y’hoshua set up at Gilgal. And he said to the sons of Israel, "When your children ask their fathers in time to come, saying, 'What are these stones?' then you shall inform your children, saying,' Israel crossed this Jordan on dry ground.' "For the L-RD your G-d dried up the waters of the Jordan before you until you had crossed, just as the L-RD your G-d had done to the Red Sea, which He dried up before us until we had crossed; that all the peoples of the earth may know that the hand of the L-RD is mighty, so that you may fear the L-RD your G-d forever. "
The other nations would hear about what the L-rd had done and would fear the L-rd of Israel.
The Israelites needed to focus on who it was that had been leading them for the past 40 years through the desert. We too need to set time aside to spend with G-d each day in prayer and Bible study.