Many times, a child who is adopted suffers a sense of rejection at the loss of his birth parents. Most of us grew up in intact families (and we should thank God for that) and have never suffered that sense of loss. Because of that, we don't recognize the loss we have suffered in our separation from God and don't feel the need to be adopted. However, accepting the gift of God that He gave through His Son is the only way to make it to heave. Unless we are adopted into the family of God, we can never be part of the Kingdom of God.