What's there to think about?
Everyone has limited capacity for stuff in your brain. You can fill that space with whatever you choose, but we cannot expect to live a flourishing Christian life if you keep insisting on filling up the space with junk or rubbish! It doesn't have to be bad, but it is just that stuff like that serves no purpose anymore! We so often let junk remain in our minds and this taints the things we see around us and impacts our faith. If you leave a pile of trash around long enough, it will decay, sometimes smell, but maybe the most common side-effect is the fact that it make the environment around it lose value and beauty. In the same way, when we thing on junk, we will stop seeing the beauty and value in all that Jesus has done for us and all that we are in him. We will begin to see only the negative and it will impact how we act. In Philippians 4:8 Paul tells us Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever thin