Arnold Bennett 
How to Live on Twenty-Four Hours a Day 

And that weekly interval of forty hours, from Saturday to Monday, is yours just as much as the other man’s, though a slight accumulation of fatigue may prevent you from employing the whole of your “h.p.” upon it. There remains, then, the important portion of the three or more evenings a week. You tell me flatly that you are too tired to do anything outside your programme at night. In reply to which I tell you flatly that if your ordinary day’s work is thus exhausting, then the balance of your life is wrong and must be adjusted. A man’s powers ought not to be monopolised by his ordinary day’s work. What, then, is to be done?