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A mule will labor ten years willingly and patiently for you, for the privilege of kicking you once.

William Faulkner (2011). “Flags in the Dust: The complete text of Faulkner's third novel, which appeared in a cut version as Sartoris”, p.290, Vintage
A mule will labor ten years willingly and patiently for you, for the privilege of kicking you once.