A Faithful Lizard

This is a true story in Japan.

One day, a house in Japan need to be renovated and someone tear open the wall. When tearing down the walls, he found that there was a lizard stucked there because a nail from outside hammered into one of its feet.

He saw this, felt pity and at the same time curious, as when he checked the nail, it was nailed 10 years ago when the house was firstly built.

What happened? The lizard has survived in such position for 10 years?! In a dark wall partition for 10 years without moving, it is very impossible.

Then he wondered, how this lizard survived for 10 years without moving a single step - since its feet was nailed!

So, he stopped his work and observed the lizard, what has it been doing and what has it eating? Later, don't know from where appears another lizard, with food in its mouth.

He was stunned and touched deeply. For the lizard that was stucked by nail, another lizard has been feeding it for the past 10 years..