Our physical and spiritual meat (food) must be the meat God first made and provided for His created beings: The Word and the Law of God.
God is in the process of restoring His people unto His image. This was how it was in the beginning, before Adam and his wife sinned.
The spiritual sight of man will be no greater than the spiritual meat (food) they are eating. The physical meat (food) of man will bring no healing nor any nutritional value. It will give no strengthening nor power to the body systems, if the spiritual meat (food) is not built on truth, the law, the light. And that is every word that proceedeth out of the mouth of God. That is what God blessed for His created beings to receive healing and health, or to maintain health and healing, as we live in this world.
Spiritual meat affects our decision-making. Therefore, we must determine to eat only the very best God made for our physical body. For spiritual things are spiritually discerned.
Let that marinate.