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서당개 삼 년에 풍월 읊는다.

 A dog of the school after three years, can chant Chinese lessons. 
 Even a fool can learn something after three years.

소 잃고 외양간 고친다.

 After losing a cow, one repairs the barn.
 Only after a big disaster, you fix the problem.

빈 수레가 요란하다.

 An empty cart rattles louder. 
 When one has little substance, it tends to rattle much.

티끌모아 태산.

 From dust to Tai Shan.
 From dust, one can build the Tai Shan, a mystical mountain, the highest in the world according to the Chinese lore.

등잔 밑이 어둡다.

 Underneath the lamp, you can't find anything.
 Don't look further. It might be simpler than you think.

• 서당개 삼 년에 풍월 읊는다. - A dog raised at Sodang for three years, can chant Chinese lessons.

• 소 잃고 외양간 고친다. - After losing a cow, one repairs the barn.

• 빈 수레가 요란하다. - An empty cart rattles loudly.

• 하늘의 별 따기. - Catch a star in the sky.

• 아는 길도 물어가라. - Even if you know the way, ask one more time.

• 티끌모아 태산. - One can build a mountain by collecting specks of dust.

• 낫 놓고 기역자도 모른다. - One doesn’t know the ㄱ (a Korean character ) even when looking at a sickle.

• 남의 떡이 더 커 보인다. - Someone else's rice cake looks always bigger.

• 시작이 반이다. - Starting is half the task.

• 등잔 밑이 어둡다. - Underneath the lampbase is dark.