I've been thinking.What is it?Wait just a second, Marisa!The walls have ears and the doors have eyes.It... It can't be!That's not what they say.Time is really important, you know...This is a secret, but...Whoa, rare to hear you so serious.They say that time is money and the walls have ears.Remilia is in the walls!
"having ears" = "miari"Meiling is in the doors!
"having eyes" = "meari"That's not what they say.Time is money and tragedy will befall you.
The full proverb she is trying to use is "Even a dog will bump into a pole if it walks." i.e.: tragedy will befall you no matter what.