We are a temple for the presence of God to dwell and for the Holy Spirit to inhabit to be used for the establishment of the kingdom of God. We are not perfect but we allow the Holy Spirit to live through us and we remain connected to God for his purpose to be fulfilled in us.
Paul encourages a daily sanctification and asking God to forgive and cleanse us from our sin. If we say we have no sin, we deceive ourselves, and the truth is not in us. (1 John 1:8) Yet we are not sinners but we are the righteousness of God. For he hath made him to be sin for us, who knew no sin; that we might be made the righteousness of God in him. (2 Corinthians 5:21)
So we are no longer slaves to sin because through the death and resurrection of Jesus Christ we live in him and our bodies are under the blood of Jesus. His grace covers us and keeps us from falling into sin. We are not able to keep ourselves pure and sinless but when we remain close to God and submit our spirits to him then the Holy Spirit does the work to keep us pure.
Daily prayer, worship and reading the word keeps us in the presence of God so that he can continue to refine us. We need fasting to help us to overcome some strongholds and the habitual sins that we struggle to get rid of. God is coming back for a Holy church without spot or wrinkle so we are holy because God is holy.