Abstaining from the devoted things is important in holy war. I can't expect to conquer the promised land or establish God's kingdom upon the earth if I desire the devoted things. Achan was enticed by a cloak and some silver and gold. But it can be anything that distracts me from my conquest. It can be money, power, greed, relationships, etc... anything! The devoted things belong to this world and are appointed for destruction. If my heart desires after them, I will partake in their destruction.
Much of the trouble in my life, I have brought upon myself for taking of the devoted things of the world. I think I can hide it and get away with it. Unfortunately, my sin has personal as well as corporate effects. Not only is my life entangled in trouble individually when I set out to embrace the sin of this world, but I bring down my whole church in a corporate fashion. In my individualistic thinking, I don't give a thought to the corporate effects of sin. The truth is that I render my church ineffective against the enemy. My battles become at best, self-reliant efforts to keep the enemy at bay. They are fruitless.
"You cannot stand before your enemies until you take away the devoted things from among you." Yes, we are sinners. But it is quite different to sin inadvertently due to ones sinful nature than to set out to defy the commands of the Lord. My fight with my wife hinders my prayers. My grudge against my brother hinders God's forgiveness for me. My sexual immorality taints the whole community once it comes to light bringing down my leadership and the whole ministry. Holy war is not fought alone. It is the effort of a whole community. My personal sin has corporate repercussions. I cannot stand to the enemy while living in sin.
The anatomy of sin is well described in Achan's confession: I saw, I coveted, and I hid. I downplay too much the role that my senses have in stimulating my desires. My eyes were given by God to enjoy his creation, but when I stare a little too long at things that stimulate ungodly desires in my heart, I run into trouble; sin is at hand. It gets further complicated when I refuse to come immediately to God. The guilt and the shame drive me away from God and I want to hide. God is omniscient and omnipresent, which means nothing is hidden from his presence. Yet, in my sin, I think that I can avoid God, even hide from him.
Consecration is key in holy war. If I want to conquer the promised land, if I desire to establish God's kingdom upon the earth, I must be solely devoted to God and his purposes. I must be single-minded. I can't be dividing my attention among many things - especially the devoted things. The consequences for taking, holding, and hiding devoted things are devastating. The devoted things will only add trouble to my life.
Lord, give me an undivided heart that I may fear your name. Cleanse me of my sin. Help me let go of the devoted things of this world. May I be totally consecrated to you.