A Story on Identity crisis

Once a  man was walking home late one night when he saw an anxious person, Mulla Nasrudin down crawling on his hands and knees on the road, searching hastily under a street light for something on the ground. The man asked :

"Mulla, what have you lost?" 

He replied -

 "I am searching for the key to my house," Nasrudin says worriedly.

"I'll also help you search for your keys", the man says and joins Mulla Nasrudin.

Both the men are soon down on their knees under the dim streetlight, looking for the lost keys.

After some time, the man asked Nasrudin, 

"Heyy, Mulla, do you remember where exactly did you drop the key?"

Mulla Nasrudin Replied, 

"Over there, inside the house…"

Shocked and exasperated, the passer-by jumps up and shouts at Mulla Nasrudin, 

"Then why are you searching for the key out here in the street?"

"Because there is more light here than inside my house,"

Mulla Nasrudin answers casually.