( from here )

Lots of sayings are silly, wherever they come from.

[It could be from anywhere. It doesn't matter to her, and maybe she's even forgotten. Regardless, it's not something she actually believes. Sometimes the best thing to say is total bullshit.]

I don't know that I'm a master of anything. [Like that line, for example. She's only half trying to sell it.] Maybe you could teach me a skill, so I'll be of use around here.