Supergirl, Season 1

Cat:
But the real key Kiera, is that you need to figure out what's really bothering you. For example, I am so furious with my mother, so I took it out on you. And you are so mad at me, but... And this is the important bit, you weren't really mad at me.

Kara:
Actually, I kind of was.

Cat:
No. You were really mad, at something else. You need to find, find that anger behind the anger. And you need to figure out what is really making you mad.