Korean proverbs

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 dusk 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.