Health is the key to a good life; it affects everything, everything affects it.

It runs both directions, which is the part usually left out. Poor sleep shortens your temper, and then an argument at eleven at night takes the next night's sleep too.

That loop can feel like a trap. It's also why you get several doors into it rather than one. You can enter through the walk, or the earlier bedtime, or the conversation you've been avoiding that's costing you both more than either of you admits.

Pick whichever door is actually open today. The loop runs in the good direction just as readily.