Where has it gone?

Junnaid was a remarkable saint and a Sufi master. He was constantly learning and getting enlightened from numerous interactions he kept having with people whom he acknowledged as his masters.

Here is one of his stories.

One day, when he went into a small village he saw a little boy carrying a lit candle. The boy was obviously going to the small temple of the town to put the candle there for the night.

Junnaid asked the boy, "Can you tell me from where the light comes from? You have lighted the candle yourself so you must have seen. What is the source of light?" 

The boy laughed and said, "Wait!" And he blew out the candle in front of Junnaid. And he said, "You have seen the light go. Can you tell me where it has gone? If you can tell me where it has gone I will tell you from where it has come from."

Left me wondering -- where did the flame come from and where did it go? Any guess?