Especially when you're out there at 7:15AM and you see the other walkers out there and they're all older than you are and you wonder why they're walking so fast and where they're in such a hurry to get to.
It can't be overstated. Walking is life. And this is in no way intended to offend those who can't walk because of some lifelong condition. But for the rest of us, we have no business walking up to our cars at the end of a work day, feeling that heavy, unused quality in our legs that tells us we've been sitting too long.
Because what follows from there? A night of sitting while you eat, sitting while you watch TV, lying down while you sleep?
It's nothing but the earth pulling you home. Will you let it?