We left Israel having discovered Achan and his sin, and it doesn’t end well for Achan:

Joshua said, “Why have you troubled us? GOD will now trouble you. Today!” And all Israel stoned him—burned him with fire and stoned him with stones. They piled a huge pile of stones over him. It’s still there. (Joshua 7.25 – 26, MSG)

“It’s still there.” A memorial. In this case, a negative memorial – don’t be like Achan! God is into memorials. Look at this specific instruction after they crossed the Jordan River:

When the whole nation was finally across, GOD spoke to Joshua: “Select twelve men from the people, a man from each tribe, and tell them, ‘From right here, the middle of the Jordan where the feet of the priests are standing firm, take twelve stones. Carry them across with you and set them down in the place where you camp tonight.’ ” Joshua called out the twelve men whom he selected from the People of Israel, one man from each tribe. Joshua directed them, “Cross to the middle of the Jordan and take your place in front of the Chest of GOD, your God. Each of you heft a stone to your shoulder, a stone for each of the tribes of the People of Israel, so you’ll have something later to mark the occasion. When your children ask you, ‘What are these stones to you?’ you’ll say, ‘The flow of the Jordan was stopped in front of the Chest of the Covenant of GOD as it crossed the Jordan—stopped in its tracks. These stones are a permanent memorial for the People of Israel.’ ” (Joshua 4.1 – 7, MSG)

We see it again after the destruction of Ai (see Joshua 8 for the whole story):

Joshua didn’t lower his outstretched javelin until the sacred destruction of Ai and all its people was completed. Israel did get to take the livestock and loot left in the city; GOD’s instructions to Joshua allowed for that. Joshua burned Ai to the ground. A “heap” of nothing forever, a “no-place”—go see for yourself. He hanged the king of Ai from a tree. At evening, with the sun going down, Joshua ordered the corpse cut down. They dumped it at the entrance to the city and piled it high with stones—you can go see that also. (Joshua 8.26 – 29, MSG)

“Go see for yourself…you can go see that also.”

We could do a better job with memorials, remembering and communicating what God has done, not just remembering, for example, what Jesus taught.

I have an idea how we could do that…stay tuned.

For I received from the Lord what I also delivered to you, that the Lord Jesus on the night when he was betrayed took bread, and when he had given thanks, he broke it, and said, “This is my body which is for you. Do this in remembrance of me.” In the same way also he took the cup, after supper, saying, “This cup is the new covenant in my blood. Do this, as often as you drink it, in remembrance of me.” (1 Corinthians 11.23 – 25, ESV, emphasis mine)