Nothing More Than Nothing

I came upon a story that I loved the first time I heard it and the significance and lesson it presents is still powerful. I regret that I cannot give credit to the author so if you know the author I would love to know. The story goes like this:

"Tell me the weight of a snowflake," a coal mouse asked a wild dove.
"Nothing more than nothing," was the answer.
"In that case I must tell you a marvelous story," the coal mouse said. "I sat on a branch of a fir, close to its trunk, when it began to snow--not heavily, not in a giant blizzard, no, just like in a dream, without any violence. Since I didn't have anything better to do, I counted the snow-flakes settling on the twigs and needles of my branceh. Their number was exactly 3,741,952. When the next snowflake dropped onto the branch---the branch broke off." Having said that, the coal mouse scurried away.
The dove, since Noah's time an authority on the matter, thought about the story for a while and finally said to herself: "Perhaps there is only one person's voice lacking for peace to come into the world."

One snowflake made all the difference. Do you want to make difference? Let your life speak.

What lesson do you glean from this story?