Siblings of Christ

What does it mean that we can call God our Father? What it means is that we have access to God. This is a big deal because, by nature, we have no access to God. What Paul is saying in this passage is that the Holy Spirit leads us to Christ, and Christ carries us to God our Father. Since Christ is the Son of God by nature—the one who has direct access to his God and Father—we are made siblings of Christ by adoption.