A Sunday school superintendent had two new boys in her Sunday school. In order to register them she had to ask their ages and birthdays. The bolder of the two said, "We're both seven. My birthday is April 8, 1976, and my brother’s is April 20, 1976." "But that's impossible!" answered the superintendent. "No, it's not," answered the quieter brother. "One of us is adopted." "Which one?" asked the superintendent before she could curb her tongue. The boys looked at each other and smiled, and the bolder one said to the superintendent, "We asked Dad awhile ago, but he just said he loved us both, and he couldn't remember any more which one was adopted."
In Romans 8:17, Paul writes: "Now if we are [God's] children, then we are heirs—heirs of God and co-heirs with Christ . .." (NIV) Paul's comparison is to adoption. By our faith in Christ we become his adopted brothers and sisters—adopted sons and daughters of God. As fully adopted and accepted children, we share the same inheritance as the begotten Son, Jesus. No wonder all creation waits eagerly for the full revealing and adoption to happen!