This passage from Ephesians discusses what it means for Christians to be adopted by God. It contrasts the "old life" before salvation with the "new life" available through adoption. The "new life" involves imitating God, walking in love, living as children of light through the Holy Spirit, worshipping God, and submitting to one another in the church family. Through adoption, believers are given a new identity and inheritance in God's kingdom and are made part of His spiritual family with Jesus as the firstborn brother.