Them: "You ought to do things according to known best practices."
Chad: "No. I will be guided not by convention, but necessity."
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From Law 41 of the 48 Laws of Power:
When General Douglas MacArthur assumed command of American forces in the Philippines during World War II, an assistant handed him a book containing the various precedents established by the commanders before him, the methods that had been successful for them. MacArthur asked the assistant how many copies there were of this book. Six, the assistant answered. “Well,” the general replied, “you get all those six copies together and burn them— every one of them. I’ll not be bound by precedents. Any time a problem comes up, I’ll make the decision at once—immediately.”