I Corinthians 3:23

And ye are Christ's; and Christ is God's (KJV)

Then: Writing to a church stunted by worldly knowledge, Paul hopes to sow the field with an understanding of real knowledge, over and above the superficial truisms of physical existence. If they can understand, they will grow. Over and over again, he tells them they belong to Christ. That's the way he ends this section which concentrated on moving away from behaviors based on self-deception.

Now: Stepping away from daily service of Christ to spend time on personal goals inevitably puts today's believers in the same spiritual level as the Corinthians. Remembering to help others, paying attention to biblical principles and teachings, and praying without ceasing keeps believers alert to spiritual growth. At the same time, we can glow with his love, celebrate his glory, and walk in his peace. No matter the physical weather (circumstances, fears, hopes), we have the confidence of knowing his presence.

Matthew Henry's Concise Commentary by Matthew Henry (1706) online at
http://www.christnotes.org/commentary.php?b=46&c=8&com=mhc