Every association has values and rules that guides them. Christianity is also guided by rules set down by God. The life of a Christian should therefore be different from that of non-Christians as shown in Romans 12 verse 1.
Christians are to present their bodies as a living sacrifice that is holy and acceptable to God. That is the reasonable service that Christians can render to God (Romans 12:1). God has set a standard and Christians must live up to it. They are not to conform to the lifestyle of those in the world but be transformed by the renewing of the mind to be able to prove that good and acceptable as well as perfect will of God (Romans 12:2). Christians are not to associate themselves with the wickedness of this world. They are to separate themselves and be holy unto God. There is a day coming that there will be Rapture of the saints. How are you preparing yourself for the rapture? Is your life different as a Christian from that of non-Christians? The life of a Christian requires him to sanctify himself from time to time.
Joshua told the people to consecrate themselves because God was going to do amazing things among them the next day (Joshua 3:5). Christians must sanctify themselves to be able to see miracles happen in their lives. Miracles of God will not come when your body is conformed to the lifestyle of this world. Sanctification makes the difference between Christian and a non-Christian. Each Christian must work his salvation with fear and trembling (Philippian 2:12-16). Living up to the statutes of God depends on your Godliness or ungodliness.