Aaron Sorkin does like using this line, but it works especially well here; when Casey gives his son the "The only thing you have to make me happy is come home at the end of the day" speech to his son Charlie.
Dan's "apology" speech in the episode "The Apology".
Dan and Casey's reconciliation in "April is the Cruelest Month":
Casey: I wouldn't trade the last ten years of working with you for anything. Not for anything, Danny, I swear to god.