고추보다 후추가 맵다 -- (Black) pepper is hotter than red pepper. This expression teaches us that even though black pepper is smaller than red pepper, it is more potent. Therefore, no matter how outstanding an individual you may be, there is always someone better. (후추는 고추보다 작은데 맵기는 더 맵다는 뜻이니, 뛰어난 사람보다 더 뛰어난 사람이 있음을 이르는 말)

English expression

• There's always a bigger fish