Telling Rio on his first day as a trainee to just endure a little longer

When asked what he would say if he went back to his first day as a trainee,

She said it was when she was 17 and knew nothing about Korean culture or social life.
So, I told you that you might not have known enough and that you just need to suffer a little.

I said I wanted to tell you that it will all pass.
I unexpectedly choked up at this part.