구르는 돌에는 이끼가 끼지 않는다고 · 구르는 돌에는 이끼가 안 낀다잖아요
a rolling stone gathers no moss; if you keep active, you won't stagnate
Example
할아버지는 구르는 돌에는 이끼가 끼지 않는다며 은퇴 후에도 매일 공부하세요.
Saying a rolling stone gathers no moss, my grandfather studies every day even after retiring.
Word parts
A translation of the English proverb: a stone that keeps rolling never gets covered in moss (이끼가 끼다).
Good to know
Pronounced [안는다]. In Korean it is almost always positive (keep moving and you'll keep growing), not the older English sense of criticizing people who never settle down.