Leviticus: the necessity of holiness

It seems to me that Leviticus is one of the most neglected books of the Bible. It's easy to understand why: it starts with seven chapters about different types of offerings, then talks about the priesthood of Aaron, then gives loads of laws which seem fairly obscure. A lot of them aren't applicable for Christians today; they have been fulfilled in Jesus' death and resurrection. We don't have a levitical priesthood anymore, nor do we offer sacrifices, because Jesus is our great High Priest and His sacrifice was offered once for all (see Hebrews 10). But it does bug me that Leviticus gets written off, especially the moral laws, because so many of the principles in those laws still stand today. Where did Jesus get 'you shall love your neighbour as yourself' from (see Matt 22:39)? Leviticus 19:18.

The key thing to remember when reading Leviticus is that at the heart of the book is the holiness of God and how God's people are to reflect that holiness. This principal is very relevant for Christians today; after all, God doesn't change. He is still holy. He still requires holiness from His people. That's one of the main ways Leviticus is used in the New Testament. Peter quotes it in his letter:

'As obedient children, do not be conformed to the passions of your former ignorance, but as he who called you is holy, you also be holy in all your conduct, since it is written, “You shall be holy, for I am holy.”' (1 Pet 1:14-16)

Peter is quoting from Leviticus 11:44 and Leviticus 19:2.

In some ways, the ways in which people demonstrate holiness have changed. In Leviticus there were laws which gave a symbolic representation of holiness and by following them, God's people would be separate from other nations. We don't have these symbolic ritual laws anymore, like purification rites (Lev 12), not eating certain animals (Lev 11, see also Acts 10) and circumcision (Lev 12:8). It's the moral perspective of Leviticus which strikes me the most: be holy in your sexuality or die (Lev 20:10-16), be holy in your words about God or die (Lev 24:10-23), be holy in your worship or die (Lev 10:1-20). Why did God judge people so harshly for breaking laws in the Old Testament? Because in their disobedience, they revealed that they really cared little for Him. Holiness is a key test of our devotion to the LORD, and the New Testament continues this same perspective:

'Or do you not know that the unrighteous will not inherit the kingdom of God? Do not be deceived: neither the sexually immoral, nor idolaters, nor adulterers, nor men who practise homosexuality, nor thieves, nor the greedy, nor drunkards, nor revilers, nor swindlers will inherit the kingdom of God. And such were some of you. But you were washed, you were sanctified, you were justified in the name of the Lord Jesus Christ and by the Spirit of our God.' 1 Cor 6:9-11.

From a New Testament perspective then, being born again is the beginning of a journey to holiness. Before we came to Christ, there was no way we could be holy. We were lost in sin. But once He saved us, He gave us His Spirit and, through His Spirit, the power to say 'no' to our flesh.

'His divine power has granted to us all things that pertain to life and godliness, through the knowledge of him who called us to his own glory and excellence, by which he has granted to us his precious and very great promises, so that through them you may become partakers of the divine nature, having escaped from the corruption that is in the world because of sinful desire. For this very reason, make every effort to supplement your faith with virtue, and virtue with knowledge, and knowledge with self-control, and self-control with steadfastness, and steadfastness with godliness, and godliness with brotherly affection, and brotherly affection with love. For if these qualities are yours and are increasing, they keep you from being ineffective or unfruitful in the knowledge of our Lord Jesus Christ.' 2 Peter 1:3-8

There's this amazing harmony in these verses of God's power in us and our own effort working together to make us holy. It's not salvation by works; it's spiritual growth, and this doesn't happen if we just sit around and fail to exercise our faith in action, or spiritual disciplines like prayer, reading the Word, helping the needy. The New Testament doesn't promise us perfection in this life; it tells us this will be a battle and a struggle which we need spiritual weapons to fight (Eph 6). But there is a sense that we will increase in practical holiness as we grow in spiritual maturity and as our passion for God takes over more and more of our hearts, souls and minds.

Our fight against sin will be most effective when we are fixing our eyes on Jesus, and exposing our sin to others with confession and prayer so that it loses its power and grip on our lives. The devil wants you to wallow in secret sin and doubt your salvation and the efficacy of Christ's redemption; the Spirit wants to convict you of sin so that you see it for what it really is, and see victory over it through Jesus' blood shed for you on the cross.

'Since we have these promises, beloved, let us cleanse ourselves from every defilement of body and spirit, bringing holiness to completion in the fear of God.' 2 Cor 7:1

'Beloved, we are God's children now, and what we will be has not yet appeared; but we know that when he appears we shall be like him, because we shall see him as he is. And everyone who thus hopes in him purifies himself as he is pure.' 1 John 3:2-3