In the study of Christian Science I found the permanent remedy for fatigue. In over forty years I do not remember ever feeling tired.
When I attended a Christian Science Sunday School for six months before I was twenty, I was healed of an inward goiter just by reading the textbook, Science and Health by Mrs. Eddy. Since I still seemed to lack energy, I asked a Christian Science practitioner how to overcome it. She recommended that I study references in Science and Health on fatigue, work, and energy.
Because I was learning a new concept of matter, the reference that interested me the most was on page 199: "The trip-hammer is not increased in size by exercise. Why not, since muscles are as material as wood and iron? Because nobody believes that mind is producing such a result on the hammer." I could see immediately that there was no intelligence in matter.