Traditionally, sanctification is categorised into three aspects.

1. Positional sanctification: is that state of holiness imputed to the Christian at the moment of their conversion to Christ. 
2. It denotes not so much one’s spiritual condition as his spiritual position. The Corinthian believers in I Corinthians 1:2  could thus be called ‘Saints’ even though they were in a carnal state.
3. Progressive sanctification: refers to the process in our daily lives by which we are being conformed to the image of Christ. 
4. It is the process of becoming what we are in Christ. In Colossians 3:1-10 it is  the putting off of the old habits of lying, stealing, backbiting, etc., and putting on the Christ-like qualities of honesty, mercy, and love.
5. Ultimate sanctification: is that state of holiness that we will not attain  in this life, but we will realize when we are finally in the presence of God:

a) In I John 3:2  it says “Beloved, now we are children of God, and it has not appeared as yet what we shall be. We know that when He appears, we shall be like Him, because we shall see Him just as He is.” 

Sanctification is the process of  putting off of the old man, and the putting on of the righteousness of Christ which  is three dimensional i.e.positional, progressive, and  ultimate. The argument of the apostle Paul in Romans 6 is that we are obligated to experience progressive sanctification because of our positional sanctification accomplished on the cross of Calvary.

True daily sanctification in this life comes through the ministry of the Word of God. Jesus told His disciples, “Now are you clean through the word which I have spoken unto you” in John 15:3. God set us apart to Himself when He saved us.