" We don’t do big magic. Lucinda’s the only one. It’s too dangerous.”
“What’s dangerous about ending a storm?”
“Maybe nothing, maybe something. Use your imagination.”
“Clear skies would be good. People could go outside.”
“Use your imagination,” Mandy repeated.
I thought. “The grass needs rain. The crops need rain.”
“More,” Mandy said.
“Maybe a bandit was going to rob someone, and he isn’t doing it because of the weather.”
“That’s right. Or maybe I’d start a drought, and then I’d have to fix that because I started it. And then maybe the rain I sent would knock down a branch and smash in the roof of a house, and I’d have to fix that too.”
“That wouldn’t be your fault. The owners should have built a stronger roof.”
“Maybe, maybe not. Or maybe I’d cause a flood and people would be killed. That’s the problem with big magic. I only do little magic "

― Gail Carson Levine , Ella Enchanted (Ella Enchanted #1)