"the nervous system may be well balanced, and the soul not endangered. Fathers and mothers should understand the laws of life, that they may not, through ignorance, allow wrong tendencies to develop in their children. The diet affects both physical and moral health. How carefully, then, should mothers study to supply the table with the most simple, healthful food, in order that the digestive organs may not be weakened, the nerves unbalanced, or the instruction which they give their children counteracted. CE 180.2"
"What? know ye not that your body is the temple of the Holy Ghost which is in you, which ye have of God, and ye are not your own?"
The EGW passage discusses the importance of physical health for moral and spiritual well-being, connecting diet and nervous system balance to the soul. 1 Corinthians 6:19 speaks of the body as a temple. While not a direct quote, the underlying principle of caring for the body to honor God connects the two.
"Satan sees that he cannot have so great power over minds when the appetite is kept under control as when it is indulged, and he is constantly working to lead men to indulgence. Under the influence of unhealthful food, the conscience becomes stupefied, the mind is darkened, and its susceptibility to impressions is impaired. But the guilt of the transgressor is not lessened because the conscience has been violated till it has become insensible. CE 180.3"
"And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God."
The EGW passage discusses how unhealthy food can darken the mind and impair conscience. Romans 12:2 speaks of renewing the mind to discern God's will. Both passages address the state of the mind and its impact on spiritual discernment, making it a thematic parallel.