Do you want to know a secret about working out? Here it is: we don’t grow our muscles in the gym. When we lift weights we perform controlled damage to our bodies; we literally tear our muscle fibers, forcing our bodies to adapt. We improve outside of the gym by consuming healthy foods. To “battle the bulge” requires a commitment to strenuous exercise and healthy eating. All who have enjoyed (or endured) a strenuous workout or have disciplined their dietary practices understand that results are impossible without bodily sacrifice — no pain, no gain.
Furthermore, if it is true that we are what we eat, then Christ-followers ought to take a long, hard look at the kinds of things we are putting into our bodies. Paul’s words to the Christ-followers in Rome offer us some food for thought (pardon the pun; couldn’t help myself).
Paul beseeches us to present our bodies as living sacrifices, that is, to submit our lived reality to the standards that God deems acceptable. Such a way of being in the world is deemed reasonable — spiritual even, as the NRSV translators put it. This is our tangible act of service to God.