Nineteen hours a day I studied. For three months I kept this pace, only breaking it on several occasions. My body grew weary, my mind grew weary, but I stayed with it. My eyes grew weary and began to twitch, but they did not break down. Perhaps, toward the last, I got a bit dotty.
Jack London. John Barleycorn
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“Better don’t if somebody is not to go absolutely dotty.”