What does sanctification mean in Christianity?

Sanctification is an essential aspect of the Christian life, indicating that believers are set apart for God’s special use. In 1 Corinthians 6:11, Paul states that Christians are not only washed and justified but also sanctified—meaning they are separated from sin and dedicated to God. This process does not imply a gradual improvement in one’s life, but rather an immediate positional change brought about by God’s sovereign choice and action. As God’s children, the vastly significant understanding of sanctification provides believers with encouragement to live in a manner reflective of their identity in Christ, fostering a pursuit of holiness and alignment with God’s will.