What does the Bible say about Christ being mine and I am His?

In the Song of Solomon, specifically Chapter 2:16, the bride declares, 'My beloved is mine, and I am His,' highlighting not only a personal relationship but also an intimate communion. This declaration signifies the assurance that believers have in their relationship with Christ, portraying a joyful affirmation that is rooted in experience and faith. It signifies a warm-hearted assurance that transcends mere theology, capturing the essence of a believer's confident possession of Christ and His ownership of them. This mutual belonging is foundational for understanding the relationship between Christ and His Church, affirming that salvation and belonging are not based on merit but on God's mercy.