In reply to Ken.

Ken, thanks for your comment. The reference is to Romans 8:19, which says: "For the creation waits with eager longing for the revealing of the sons of God." Who these are is explained by St. Paul in another place: "But now that faith has come, we are no longer under a guardian, for in Christ Jesus you are all sons of God, through faith. For as many of you as were baptized into Christ have put on Christ" (Galatians 3:25-27 ESV).