Romans 8:23

And not only so, but ourselves also, who have the first-fruits of the Spirit, even we ourselves groan within ourselves, waiting for our adoption, to wit, the redemption of our body. "And not only so" -'Not only this' (NASV)

"But ourselves also" -i.e. us Christians

"Who have the first-fruits of the Spirit" -Used figuratively, "the first fruits" signify the assurance of much more to follow, namely the revelation of the glory or the liberty of the glory. (Lenski p. 541) N.T. Christians received 'miraculous gifts of the Spirit' (1 Corinthians 12:1; 1 Corinthians 13:1; 1 Corinthians 14:1), and even we today who follow the Spirit's teaching produce the 'fruit of the Spirit' (Galatians 5:22), but even greater blessings are to come, i.e. the resurrection and transformation of our physical bodies. See also: (Ephesians 1:13; 2 Corinthians 1:22)

"Even we ourselves groan" -we understand this "groaning" experience. We too long for liberation from this physical existence. (2 Corinthians 2:4)

"within ourselves". 2 Corinthians 5:4 'while we are in this tent (body), we groan'.

"waiting" -again, "waiting" means "eagerly expecting". All Christians who are allowing themselves to be led by the Spirit (Romans 8:6) are 'on tiptoe' and are eagerly expecting their full adoption, i.e. the complete redemption of body and soul.

"redemption of our body" -(1 Peter 3:21). 'When the body, too, is raised from the dead, and joined in glory with the soul, then all that adoption includes will be fully in our possession, and there will be nothing beyond that is still to be added.'

Hence the Christian doesn't despair with the prospect of growing old, or in the face of. disease that the body can't fight off. Our salvation, involves the 'saving' of the body.