a small elephant

A small elephant was born in the circus, it's parents are the old circus performers.The small elephant is very mischievous, always want to running freely. The staff tied its legs with a thin chains to the iron bars.The small elephant hated the chains,but it could not struggle to free itself.At first,after tried by the thousands and tens of thousands times, it had to go forword and backward within the scope of the chains finally. a few days later, the small elephant tried again, but it was not successful, so it had to be content. Time and again,The elephant was no longer to try, and it used to chains,it took a look at their parents ,found them are the same as itself, it seemed to be this way. The little elephant grown up day after day, it can break the chains easily, but it never think of doing this. It had believed that it was unassailable to do this. This strong psychological hint had deeply implanted in its memory.