I once knew a woman, not very strong, who to the wonder of her friends went through a time of extraordinary hard work without any ill effects.
I asked her for her secret and she told me that she was able to keep her health, under the strain, because she took 20 minutes, of each day in which to absolutely relax both mind and body. She did not even “set and think.” She lay at full length, every muscle and nerve relaxed and her mind as quiet as her body. This always relieved the strain and renewed her strength. ― Laura Ingalls Wilder
