Sanctification is the process of making holy, and is done by the Holy Spirit. 1 Peter 1:15-16 tells us to be holy as God is holy. It is derived from the Greek word Hagios and is an ongoing process. To be sanctified means to be set apart unto God for His purpose.
We must allow the Holy Spirit, Who is the agent of sanctification and Who makes us into the image of Christ daily, to transform us and make us like Christ in holiness (2 Thessalonians 2:13).
Sanctification is the process between justification (at salvation) and glorification (in eternity). As believers, we are righteous in Christ because of the finished work of the cross. Righteousness is our position and a gift given us but holiness is the nature of God and is a fruit of the working of the Holy Spirit in our lives which will cause us to manifest the nature of God.
Galatians 4:19 describes Paul being in pain like that of child birth until Christ is formed in us. As Christ’s followers, this should be our hearts’ desire & we must seek to be like Christ so as to reflect Him.
We live a holy life by:

1. The blood of Jesus – we must walk in the light of Christ, be submitted to His Lordship then His powerful blood purifies/cleanses us free from a life of sin (1 John 1:7). We can enter boldly into the sanctuary because of the blood of Jesus (Hebrews 10:19).
2. The word of God – when we sow the powerful, living and enduring Word of God in our lives, it dominates our lives and because it is incorruptible and imperishable in nature, we will produce the same nature (1 Peter 1:23). Jesus prayed that we will be sanctified by the truth, the truth of God’s word (John 17:17).
3. Offering our bodies as a living sacrifice – we are called to offer our bodies and every aspect of our lives daily; as long as we live we are to live for God so that we can become like Christ (Romans 12:1-3). God’s altar sanctifies our lives when we put our bodies on it.
   Christianity is all about becoming like Christ! Let us seek to be sanctified by the Holy Spirit and reflect the nature of God.