Movie Cliches 101: Plagiarizing Yourself

If there are only six good stories -- or is it twelve? twenty-three? forty-two? -- how many good lines are there?  Clearly Aaron Sorkin thinks there is a limited supply.  Write something good once, might as well write it again, right?  

It's been out and around for awhile but I still find "Sorkinisms -- A Supercut" kind of remarkable.