A spiritual mind is one that thinks in line with the Spirit of God and the Word of God. It has been renewed; the old ways of thinking have been swept out and replaced with new thought patterns. Most born again believers have never been taught how to renew their minds, so their carnal mind has them in a constant dilemma. They love the Lord, and they are going to heaven, but they're not enjoying their rights and privileges as a Christian now. If we are just supposed to get saved and then wait until heaven to receive God's riches, we wouldn't need the Holy Spirit now. We wouldn't need the weapons of our warfare now. You see, God wants us to receive His abundant life right now, but we must be spiritually minded to do so. The carnal mind is the enemy, in opposition to God, but the spiritual mind is life and peace.
This kind of life is only for the spiritually minded. Only those who have been transformed by the renewing of their minds can have life in its highest form. Those who are carnally minded have death. The way we think determines whether we have life or death.
Your body and your mind need to be fed properly.