"Intellectual, physical, and moral culture should be combined in order to have well-developed and well- balanced men and women. Some are qualified to exercise greater intellectual strength than others, while others are inclined to love and enjoy physical labor. Both of these should seek to improve where they are deficient, that they may present to God their entire being, a living sacrifice, holy and acceptable to him, which is their reasonable service. The habits and customs of fashionable society should not shape their course of action. The inspired apostle adds, “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.” [ Romans 12:2 .] CE 20.1"
"I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service."
The EGW passage explicitly quotes Romans 12:2 and directly alludes to Romans 12:1, making the connection undeniable. The passage builds upon the concept of presenting oneself as a living sacrifice, connecting it to the need for balanced intellectual, physical, and moral development.
"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."
Ellen White directly references Romans 12:2 in this passage.
"Thinking men's minds labor too hard. They frequently use their mental powers prodigally; while there is another class whose highest aim in life is physical labor. The latter class do not exercise the mind. Their muscles are exercised, while their brain is robbed of intellectual strength; and the brain-workers neglect exercising the muscles, and rob their bodies of strength and vigor. Those who are content to devote their lives to physical labor, and leave others to do the thinking for them, while they simply carry out what other brains have planned, will have strength of muscle, but feeble intellects. Their influence for good is small in comparison with what it might be if they would use their brains as well as their muscles. This class fall more readily if attacked with disease, because the system is not vitalized by the electrical force of the brain to resist disease. CE 20.2"
"For the body is not one member, but many."
Both passages discuss the importance of different parts of the body (or different types of labor) working together. EGW elaborates on the consequences of neglecting either physical or mental labor, while Paul uses the analogy to describe the church. The underlying principle of diverse roles contributing to a whole is present.