What kind of fate is this?
I move, you're my neighbor.
I come to school, you're my teacher.
You never know about fate.
(Song Yi to Min Joon)

If you want to, and even if you don't, things are bound to happen.
Earthlings call it as FATE. (Min Joon)

If I help you once, twice, thrice, continuously asking for help. That is the way people live. And, paying me back whenever, won't happen. Life isn't long enough for people to mature. (Min Joon)

I don't understand it. Why do people say they like me in front of my face, and then hate me from behind? Just why would they do that? (Song Yi)

People live really diligently even though they know they're going to die. Even though they know they will break up at one point, when they love, they love like there's no tomorrow. (Young Mok)

People don't want to know the facts. They just need someone to blame. 

Once we know everything about each other, the fantasies about each other will be gone. (Song Yi)

If you're healthy, you can protect your loved one. (Min Koo)

Do you know why life is interesting?
It's interesting because you don't know what's ahead of you. (Se Mi's mom)

Only hide when you've done something wrong.
Don't just hide. (Min Joon)

Open your heart.
Someone will come, someone will come for you.
But first, you have to open your heart.

Mom, he is the only one in the universe that I love.
There was no one before him and there won't be anyone after him.
Though he may not be an ordinary person, to me he is just a person I love. (Song Yi)