For the mind set on the flesh is death, but the mind set on the Spirit is life and peace, Romans 8:6
We live with a battle between the flesh and the Spirit. The question is which one are you going to let win? We must remember that we are born sinners (Romans 3:23) and its our natural instinct to want to feed the flesh. We feed the flesh through food, sex, power, violence, ect.
But to live by The Spirit is life and peace. If all you do is allow yourself to be controlled by the flesh, you will be consumed with the wages of your sins. You need to allow The Holy Spirit, to help guide you to live righteously otherwise if you allow the flesh to control you, you will live carnally minded.
Jesus said in Matthew 4:4 “Man can’t live on bread alone, but on the Word of God” , Jesus was saying we can’t just live to feed our flesh, we need to feed our Spirit. The only way we can feed our Spirit is through God, reading his word, praying, spending time with him. If we only focus on feeding our physical needs, we will be misled by the world.
This is why repentance is a transformation. It’s not just a confession that Jesus is your Lord and Savior but I change in your heart and mind. When you live and walk by The Spirit there will be eternal life and peace, but to continue to live by the flesh is sin and death.