An inventory of a room in any home can reveal much about the people who live there. For example, there are three book shelves in our living room that run from floor to ceiling. Scattered about the house there are many other books as well. Most of these belong to my wife. I have a few shelves myself, though not as big or quite as many books. Therefore, anyone can see that in our home, we like to read.
In the same way, an inventory of our thoughts can tell what kind of life we live. Do we live a life according to our sinful nature, or according to the Spirit of God?
Our minds are like a theater, and whatever is showing will reveal much about how we live, as Paul said,
"Those who live according to the flesh have their minds set on what the flesh desires; but those who live in accordance with the Spirit have their minds set on what the Spirit desires. The mind governed by the flesh is death, but the mind governed by the Spirit is life and peace." Romans 8:5-6 (NIV)
What is playing today in the theater of your mind? What would an inventory reveal?