[Rin's trying to figure out her new magic, when someone suddenly splashes water all over her. That's what she gets for focusing on her own thing in the middle of possibly many others, who may be totally new to magic...

Anyway, Rin turns to look at her as soon as it's clear where that came from. What is she doing wrong? Well... The rude answer would be so many things or everything but Tohsaka doesn't start with that. This situation reminds her of a conversation with her father except Rin was in that girl's shoes back then. There's a polite smile on her face despite the sudden splash and everything else.]

You can't just force magic to happen. If you really want to control magic, you must stay calm and control your own mind first.