One of the things I find remarkable is that after you’ve been sick and are healthy again, you feel exactly the way you did before getting sick. All the cellular changes that occur to make you feel congested and nauseous resolve to their normal state as if nothing happened. How do our cells remember what normal operation is after a week of battling virus or bacteria? They probably don’t remember. They probably die and are replaced with new cells which know instinctively when born what normal operation is. It’s funny to think of cells as being born and operating on instinct. on a related note, I wonder if people, when healthy, feel very much physically different from one another. If you found another individual of the same sex, height, weight, and build, and you could for a brief moment swap with them the way you feel physically, would you notice a change? I’m sure you would. I think the way each of us feels inside our bodies differs significantly from person to person.