Set your mind on things above, not on things on the earth.
For you died, and your life is hidden with Christ in God."
Colossians 3:1-3 (NKJV)
We need to have checkups for things like our cars and our teeth. By having regular checkups, we can be sure that everything is working the way it is supposed to. It can be easy to let things go with our car or our teeth and not think about them until there is a problem, then we really think about them and dread the expensive consequences we may face. A regular schedule of maintenance and checkups for our car and regular dental care and checkups for our teeth can help prevent major problems in the future.
In Colossians 3 it says that if we are believers in Jesus, we need to have our focus on heavenly things; we should not have our focus on things in this world. We need to use the standard of God's Word to see if we are in tune with God's plan or if we need some adjustments in our life. If we use the standard of the world to try and live our life we will be out of tune with God and His plan. We all need to be sure we are having regular maintenance and checkups through the truth we find in God's Word.
To know who we really are, we have to find out about our true identity, our life that is hidden in Christ. God has given us His Word to see who we really are and how we can live the life He has called us to. This of course means that we need to have a regular time of reading and studying God's Word to be sure we are in line with God's plan and purpose for our life. Reading and studying God's Word is a checkup for us, it helps us to see who we really are and what we should be doing.