What's wrong with falling down? You can always stand up again.
If you look up at the sky after falling down, the blue sky is also today stretching limitlessly and smiles at me… I’m alive.

Aya - 1 Litre of tears Episode 8

Human beings’ hearts change, that’s their specialty. Forever? There’s no such thing. Love, then hate. Hot, then cold. Upset, then grateful. Full of resentment, then understanding. And it goes on.
Scheduler - 49 days

白と黒のその間に 無限の色が 広がってる。
In between black and white there are infinite colours.
GIFT - Mr. Children

Without knowing his true essence, a man cannot truly know himself. Once you find out what your essence is, you'll also appreciate who you are for real.
Park Tae Seo - Gu Family Book Episode 21

Don't be afraid of what you chose. The moment you lose yourself in fear, you will lose everything. Understand? The opposite of trust is not doubt but fear.
Gu Wol Ryung - Gu Family Book Episode 22

The world is like a mirror. If you spit and curse at it, the world will spit and curse back at you. If you laugh, the world will follow and laugh with you, too.
Jung Shi Hyun - Cruel City Episode 4