A message that helps us understand our physical age is not linked to our spiritual maturity and that there are different stages or levels of maturity
2 Corinthians 13:5–6 (NIV)
5 Examine yourselves to see whether you are in the faith; test yourselves. Do you not realize that Christ Jesus is in you—unless, of course, you fail the test? 6 And I trust that you will discover that we have not failed the test.