God is ALWAYS good!
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It is very important to remember God's faithfulness, how do we do it?
10 And Joshua added: In this you will know that the living God is among you, and that he will drive out before you the Canaanite, the Hittite, the Hivite, the Perizzite, the Girgashite, the Amorite and the Jebusite. 11 Behold, the ark of the covenant of the Lord of all the earth will pass before you into the midst of the Jordan. 12 Now therefore take twelve men from the tribes of Israel, one from each tribe. 13 And when the soles of the feet of the priests who carry the ark of the Lord, Lord of all the earth, rest on the waters of the Jordan, the waters of the Jordan will be divided; for the waters that come down from above will stand in one heap.
14 And it came to pass, when the people set out from their tents to pass over the Jordan, with the priests bearing the ark of the covenant before the people, 15 when they that bare the ark were come unto Jordan, and the feet of the priests that bare the ark were dipped at the brim of the water (for the Jordan overfloweth all his banks all the time of harvest), 16 that the waters which came down from above stood upon an heap a great way off the city of Adam, which is beside Zaretan; and that which came down to the Sea of the Arabah, even to the Salt Sea, ceased, and was divided; and the people passed over toward Jericho. 17 But the priests that bare the ark of the covenant of the LORD stood upon dry land in the midst of the Jordan, until all the people had made an end of passing over the Jordan; and all Israel passed over on dry land. The Twelve Stones Taken from the Jordan
4 When all the people had finished crossing the Jordan, the LORD spoke to Joshua, saying, 2 “Take twelve men from the people, one from each tribe, 3 and command them, ‘Take from here out of the middle of the Jordan, from the place where the priests’ feet stand, twelve stones, and you shall carry them over with you, and set them up at the place where you are to spend the night. 4 Then Joshua called the twelve men whom he had appointed from among the children of Israel, one from each tribe. 5 And Joshua said to them, ‘Cross before the ark of the LORD your God into the middle of the Jordan, and each of you is to take up a stone on his shoulder, according to the number of the tribes of the children of Israel, 6 so that it may be a sign among you; and when your children ask their fathers in time to come, ‘What do these stones mean? ’ 7 you shall say to them, ‘The waters of the Jordan were divided before the ark of the covenant of the LORD. ’ When she crossed the Jordan, the waters of the Jordan were divided; and these stones will serve as a memorial to the children of Israel forever.
8 And the children of Israel did as Joshua commanded them: they took twelve stones from the middle of the Jordan, as the Lord had spoken to Joshua, according to the number of the tribes of the children of Israel, and they carried them to the place where they camped, and set them up there.
Joshua 3:10-4:8
Let's think about the following: when there is an anniversary, a birthday of someone dear or similar dates we tend to remember it easily, but what we do tend to forget is the goodness of God in our favor, the text that we have read previously invites us to remember the goodness of God.
In this picture we see that after the people of God left Egypt in the best conditions and after crossing the Red Sea, God allowed them to cross the Jordan on dry land. He knew that the people of Israel were about to enter Jericho and God would help them win. All of this is an illustrative picture of the power of God in favor of his people. God shows his presence with his people. And with that miracle, God makes himself present, knowing that previously his people had forgotten him.
God wanted his people to remember him, to remember the miracle he had performed by opening the waters as a demonstration of his care for his people. At that moment, God told them to make a monument to remind them of that fact, what a construction with 12 stones and each one representing each one of the tribe and in this way Israel would remember forever that God had helped them cross the waters, thus remembering God's divine rescue for his people forever.
you will say to them, The waters of the Jordan were divided before the ark of the covenant of the Lord; when it crossed the Jordan, the waters of the Jordan were divided; and these stones will be a memorial to the children of Israel forever.
Joshua 4:7