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A certain priest said that if one thoughtlessly crosses a river of unknown depths and shallows, he will die in its currents without ever reaching the other side or finishing his business. This is the same as when one is indiscriminately eager in being a retainer without understanding the customs of the times or the likes and dislikes of the master and, as a result, is of no use and brings ruin upon himself. To try to enter the good graces of the master is unbecoming. One should consider first stepping back and getting some understanding of the depths and shallows and then work without doing anything the master dislikes. "Hagakure"