Once upon a time,some blind men met together.They heard about elephant,but could not imagine how it was like,so they decided to find a chance to touch the elephant.
The chance came before long.The first man,only touching the teeth,said that the elephant was like a round stick.The second man,only touching the body,said that the elephant was like a wall.The third man,only touching the leg,said that the elephant was like a pillar.The fourth man,just catching the tail,shouted that the elephant was like a rope.They insisted their own idea and could not reach common understanding on how the elephant was like.
This story tells us that one can not judge things superficially just from partial impression and knowledge.On the contrary,one should make conclusion after complete and thorough study.