They were also to build an altar of natural stones (without being altered by anyone) on which they were to offer burnt offerings and sacrifice peace offerings. This altar was to be built on Mount Ebal from which the curses were proclaimed from - sin, and the Israelites had to proclaim these curses personally.
Here lies a very powerful object lesson, if we allow God to speak to us:
In order for us to live victoriously in the land the Lord has given to us in this life and have a victorious one in eternity, we need to arrive and acknowledge our mountain of sin where sacrifice needs to happen and you need to understand that you can add nothing of value to that sacrifice.
In other words, you need to arrive at a place in your life where you understand that your sin is to be handed over to Jesus Christ, our High Priest, through confession to Him; and, that there's nothing that you can do to make that process better on your part, or on your behalf.
The good news is that Jesus Christ is not only our High Priest, but also the Sacrifice that atoned for our sins once and for all! All we have to do is believe that and receive that removal and cleansing of our sin by God's grace through faith! (Eph. 2:8-9)
The meaning of the names of those hills that the Israelites came to is "barren" and that's indeed how it feels when you come to that place yourself. But God promises that once you place your sins and your very life in Christ, you will lose the old life and gain a vision of the Promise Land that is absolutely BREATH-TAKING!
From those barren hills God's people could see the whole land He had given to them to possess; and, from the barren hill where Christ was crucified we too can see the promises of God and receive them as our own, including eternity with our Lord.
