every coin has two sides.
凡事都有两面．
you can't eat a cake and have it.
针无两头利．
In doing we learn.
实践出真知
constant dropping wears the stone.
滴水穿石．
The person who l wongder is innocent.
不知者无罪
Live and learn
活到老学到老
Neverb say never
永不说不
There is no royal road to learn
书山有路勤为径,学海无涯苦作舟
Scholar becomes proficient in diligence dredge,a deed is accompanied through taking thoughts destroy
业精于勤疏于嬉,行成于思毁于随