What is the significance of Christ's sacrifice for the church?

In Ephesians 5:25-26, it is stated that Christ gave Himself for the church to sanctify and cleanse it with the washing of water by the Word. The significance of this sacrifice lies in its power to remove sin and purify believers, enabling them to stand before God as holy and blameless. It signifies that salvation is not merely about forgiveness but also involves a transformative process where the believer is renewed and conformed to the image of Christ. Therefore, Christ's sacrifice is fundamental to the identity and mission of the church, which is to proclaim His glory and grace to the world.