"For the mind set on the flesh is death, but the mind set on the Spirit is life and peace" (Romans 8:6).

You are what you eat, we've often heard. Although it may not be quite that simple, physically speaking there is truth to this. Our bodies are composed in a sense of what we put in them and so it's a good idea to put healthy things into our bodies. The same is true for our souls. In other words, you are what you think. If you, for example, think a lot about fleshly desires, that's going to have an impact on your feelings, behavior, and what you may be tempted to do. If you think a lot about wrongs committed against you, you're likely to develop a vengeful attitude. If you think a lot about how others have it better that you, you're likely to develop an attitude of envy and resentment. Who we are all begins with how we think, and thus it is critical that we practice the greatest self-control within our own minds. It's critical we learn to think on good things and shut out bad thoughts. It's so critical that God's word says it's a matter of life and death.