Friday was such a change from his previous two day-after news conferences that Harbaugh smiled regularly and said he was quoting poet Ralph Waldo Emerson in response to a question about drawing motivation from outside sources,
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"Energy is energy," Harbaugh said. "There's positive energy, there's negative energy. Sometimes a person can get more energy from negative energy. Sometimes that can be a gift. Thank you very much. As long as all is said against us, you feel a certain assurance of success."