She was resting to get well.

If she had rested and complained of her illness I doubt if she would have been well to-day.

She simply refused to take the unpleasant sensations into consideration except for the sake of resting out of them.

When she was well enough to take a little active exercise she knew she could rest better and get well faster for that, and she insisted upon taking the exercise, although at first she had to do it with the greatest care.

Now that this woman is well she knows how to rest and she knows how to work better than ever before.
For normal rest we need the long sleep of night.