It is a proven fact that everyone on this earth has some bit of madness within their soul. I am no exception and neither are you.

O, hark! what mean those yells and cries? His chain some furious madman breaks; He comes--I see his glaring eyes: Now, now, my dungeon grate he shakes. Help! Help! He's gone!--O fearful woe, Such screams to hear, such sights to see! My brain, my brain,--I know, I know I am not mad but soon shall be.

Kyubey: ...Oh, geez. I never would have thought you capable of throwing your friend off a bridge. That wasn't a sane act, Madoka!

Losing your mind is just like ruining a flower just have to keep plucking at their petals

We are not ourselves When nature, being oppressed, commands the mind To suffer with the body.

There is a pleasure, sure, In being mad, which none but madmen know!