I always smile when I read the first verse of Joshua chapter 13. Joshua was, old, near the end of his life. So the Lord said to him, "You are old, near the end of your life, and there is a lot of land left to be conquered." As you know, I am an individual trying to ignore the aging process pretending, like the rest of our culture, that if I use the right lotions and potions and follow a certain anti-aging regimen I can defy the natural process of getting old.
We can avoid the truth ourselves, but I love the way God lays it out there. "You are old." Whew! However, look at the end of the verse - God still had a plan and a purpose for Joshua. As long as God sustains a life, He has a purpose for that life!!
In verses 2 - 6 God told Joshua about the land He was giving to the Children of Israel. There was land to be conquered, and in verse 6 God gives the plan. "I will force out of the way of the people of Israel everyone who lives in the mountains from Lebanon to Misrephoth Maim and all the people of Sidon. However, you must distribute the land as an inheritance to Israel by drawing lots, as I commanded you." God told Joshua, You are old, there is no need for you to continue in battle; I will win the battle and you divide the land.