This principle clearly covers the care of our bodies. In an overall sense, our stewardship is not merely to labor not to destroy the established relationship but to improve it. Good health is extremely valuable. Even though one can overcome poor health in one's vanity, of greater importance is that good health promotes the strengthening of the relationship. This is so because it is bound within the sanctification process. It is tied directly to growing, overcoming, purifying one's life, avoiding the pitfalls of life, living the abundant life, as well as to our witness before the world in glorifying God.
We can undertake a great deal of serious effort in keeping ourselves from committing sins like idolatry, fornication, adultery, lying, or stealing, while virtually ignoring the physical care of the body itself. Oftentimes, we do this by being ignorant of the responsibility or foolishly thinking that maintaining or improving our health is of little concern. The younger among us may find it helpful to ask someone older—one whose health is deteriorating or who has had to deal with poor health much of his life—how important having good health throughout life is. In no way should this reduce our efforts to overcome spiritual weaknesses, but it should encourage us to add another area of overcoming that will glorify God.
Genesis 2:15 says, "Then the LORD God took the man and put him in the garden of Eden to tend [dress, KJV] and keep it." Dressing and keeping is an overall responsibility for everyone in what we are to do with life. It applies to life's spiritual and physical aspects. We are to begin where we are and cultivate, embellish, and encourage growth, while at the same time preserving, guarding, and protecting through maintenance from decay and deterioration.
A direct line connects this concept and Jesus' instruction in the Parable of the Unjust Steward. The spiritual level is more important, but God wants faithfulness in the physical level also because both are inextricably bound in yielding to Him in the building of character. Both require study, meditation, and setting goals, as well as consistent, faithful application. We do both to glorify Him.
Unfortunately, some will not do what is necessary for success, perhaps because of ignorance of their responsibility. Others know but lack the character or the sense of responsibility. Some spend their time rationalizing and justifying the way they are or proclaim to themselves and others that they are victims of the system and have no way out. Nevertheless, God is in heaven, and He is the way out.
Eating is a major part of life, as substantiated by the Bible's 700 references to it. The abundant life that Jesus proclaims He wants all to lead hinges upon what we eat spiritually and physically. We must make a major effort to feed our minds and bodies with the best nutrition available, if we desire good spiritual and physical health.