In Scripture it says be transformed by the renewing of your mind (Romans 12:2).
The Apostle Paul was saying we need to love the Lord with our minds so that we can test and approve what God’s will is, His good, pleasing and perfect will.
My daughter loves to read and just started writing a book about a cat. My wife and I read the first paragraph and were blown away by her word choices, proper grammar, and use of words to draw the reader into the story and want to keep reading. Did I mention my daughter just turned ten years old? And she is writing a story like what you might see from a late high school or early college student.
In our home we (me and my wife) have emphasized reading above media like television and movies. We still watch movies but only a few (2-3) per week and we screen what our children watch. When I was pursuing my Master’s degree I took a class called “Christ and Culture” in which we read books about the importance of reading above media influence (e.g., “Amusing Ourselves To Death” by Neil Postman) and we looked at brain scans of teenagers and adults with a high media exposure compared to a normal brain. Below are images that speak louder than words.
The above picture shows more brain activity in a person with low violent media exposure. In other words high violent media exposure changes your brain and how you think. Similarly, below is another image of a brain affected positively by reading. This increases brain activity.
In short, as Christians we are called to be transformed and we do this through intellectual stimulation. This is not just done by reading or taking classes or going to church and hearing a sermon or Sunday school, but also by feeding our minds with healthy, godly thoughts (like reading the Bible or books and news articles with a Christian worldview).
May we do this to test and approve what God’s will is, His good, pleasing and perfect will.