If you’re going to serve the Lord you’re going to have to realize that it was grace that brought you this far. It wasn’t Israel’s strength of arms or their technology that gained them the Promised Land. God says through Joshua, it was a gift. “And I have given you a land for which you did not labor, and cities which you did not build, and you dwell in them; the vineyards and olive yards which you did not plant, you eat.”
It was grace. “For the Lord our God, he it is that brought us up and our fathers out of the land of Egypt, from the house of bondage, and which did those great signs in our sight, and preserved us in all the way we went.” (Joshua 24: 17)
We also realize a change of heart and mind is always needed. The beginning of what we do is marked by the fear of the Lord. Our worship is our first consideration. Therefore, Joshua directs the people to see that to serve God requires complete and perfect integrity. Fidelity to truth determines how reliable our relationship is. Every other method of judging things must be put away. (Joshua 24: 14)
Now, we can choose not to serve the Lord but we cannot choose how we will serve the Lord. God chooses that and says to us, “Follow me”.
The sooner we realize that, the better.