Sanctification

The word sanctification in the Greek language is 
“hagiasmos” meaning (1) to be apart from sin (2) consecrated unto God, to be conformed to His holiness, purity, and perfection of character. The scripture teaches that “sanctified” is what the believer is [not a process, but a state, which the believer has already entered into once and for all. Acts 20:32; Romans 15:16; 2 Thessalonians 2:13; Hebrews 10:10-14; Ephesians 5:25-26; 1 Peter 1:2; Acts 26:18], and “perfect” is what he is expected to be. Perfection is a spiritual growth for those who have been sanctified and consecrated. Therefore it is the total yielding of one’s life to the Holy Spirit, living the crucified life; being an overcomer; and being conformed to the image of Christ Himself. Perfection and true holiness are impossible without the indwelling of the Holy Spirit. All attempts at achieving perfection without the Holy Spirit generally results in frustration and failure, inasmuch as “flesh” 
cannot crucify flesh. 1 Peter 2:21-22
1 Peter 1:15
John 3:8-9
Corinthians 10:13
Matthew 5:48