It was rainy. An old lady was browsing in a furniture shop.
The store clerk asked her,
"May I help you? Would you like to buy some furniture?"
She replied,
"No. It's rainy outside, and I have to wait for my chauffeur until he brings the car here. I'm just browsing waiting for him."
Then the clerk treated her kindly, saying,
"Really? Please come in and wait until he comes. Here is a very comfortable chair."
This store clerk gave the old lady favors which were beyond his duty. After that day, a letter was delivered to the clerk. The letter was from "Iron King, Carnegie." It said in the letter that he would purchase some furniture equivalent to tens of thousands dollars for his company and his mother recommended this shop to him. Carnegie's mother was the very person the clerk had treated kindly on the rainy day.
Trivial consideration brought him considerable reward.