It's arrogant to judge others inferior to yourself.
Larry is a successful lawyer who just won a case against another lawyer, who's nowhere near as successful as Larry.
Larry wants to say something to his opponent - the lawyer who lost the case.
Larry encourages the other lawyer, tells him not to give up and even gives him some good advice.
Larry tells the other lawyer that he is a joke, and he'd better change careers, because he has no future as a lawyer.
The other lawyer feels a little better despite loosing the case, and he is very grateful to Larry for the kind words and the advice.
The other lawyer is humiliated by Larry's words, his confidence is crushed, and he feels useless.