But you still look puzzled. And that is a good question. I've never gone in to argue the point with the manager. After all, there's truth in it. We can't make good blood out of bad food.
Good food is suited to build a strong body and keep the mind clear.
But if we are simply what we eat, if there were not more to it than that, a feeding study at Loma Linda University, carried on long enough, might be expected to produce participants somehow resembling each other. Needless to say, we do not anticipate that. Jesus came to the root of health by faith when He observed that it isn't what goes into a man but what comes from his heart that defiles him. In fact, I don't thing it's talking precisely about diet. I do think it reinforces the idea that we are more than what we eat.