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Identify the speaker and the significance of the following quote:
"I did what I had become best at doing: I tended to my work, even while my dying professor waited on his front lawn. I am not proud of this, but that is what I did."
Who is Mitch? Significance: Show what Mitch's life and priorities were like when he first got back in touch with Morrie. Shows how much he had changed since college and would change from now on.