"Health and Efficiency Health is an inestimable blessing and one more closely related to conscience and religion than many realize. It has a great deal to do with one's capability for service and should be as sacredly guarded as the character, for the more perfect the health the more perfect will be our efforts for the advancement of God's cause and for the blessing of humanity. CT 294"
"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? For ye are bought with a price: therefore glorify God in your body, and in your spirit, which are God’s."
EGW's statement about health being related to conscience and service, and the body being important for advancing God's cause, parallels the concept in 1 Corinthians 6:19-20 that the body is a temple of the Holy Spirit and should be used to glorify God.
"There is an important work to be done in our schools in teaching the youth the principles of health reform. The teachers should exert a reformatory influence in the matter of eating, drinking, and dressing, and should encourage their students to practice self-denial and self-control. The youth should be taught that all their powers are from God; that He has a claim upon every faculty; and that by abusing their health in any way they slight one of God's choicest blessings. The Lord gives them health to use in His service, and the greater their physical strength, the stronger their powers of endurance, the more they can do for the Master. Instead of abusing or overtaxing their physical powers, they should jealously guard them for His use. CT 294.2"
"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? For ye are bought with a price: therefore glorify God in your body, and in your spirit, which are God’s."
The EGW passage directly echoes the sentiment of 1 Corinthians 6:19-20. Both emphasize that our bodies are temples of the Holy Spirit and should be used to glorify God. The EGW passage expands on this by applying it to health reform and self-control.