Magica Quartet said this quote

Miki-san... do you truly want that person's dream to come true? Or is it that you want to be that person's savior for making that dream come true? If you're going to fulfill someone else's dream, that's the time when it's most important to be sure you know your own wish. The two might seem the same, but they're entirely different.

~ Magica Quartet

Madoka: Won't anyone notice that Mami-san is dead?Homura: Mami Tomoe's only relatives are distant relations. It will be quite some time before anyone files a missing persons report. When one dies on that side of the wards, not even a body is left behind. She'll wind up forever a missing person... That is what happens to magical girls in the end.Madoka: ...That's too cruel! Mami-san has been fighting all alone for a long time for everyone's sake! For no one to even notice that she's gone... That's just too lonely a fate...Homura: It is just that kind of contract that gives us the power in the first place. It isn't for anyone else's sake. We fight on for the sake of our own prayer. So for no one to notice... for the world to forget us... That is just something we have to accept.

~ Magica Quartet

Kyōko: You... you call yourself human?!Homura: Of course not. Neither are you.

~ Magica Quartet

Kyubey: You have no idea how much difficulty we go through trying to understand your human values. Presently there are six billion, eight hundred million of you, and you're increasing in number by a hundred every four minutes! What's the huge fuss over the death of each and every single creature? Madoka: If that's how you think of us, then yes, I see you are our enemy.

~ Magica Quartet