People have wondered where the seat of original sin is; I think it 's in the stomach. A man eats too much and neglects exercise, and the Devil has him all his own way, and the little imps, with their long black fingers, play on his nerves like a piano. Never overwork either body or mind, boys. All the work that a man can do that can be rested by one night's sleep is good for him, but fatigue that goes into the next day is always bad.

Old Town Folks (1869) Ch. 39 Last Days In Cloud-Land