Kindness can be addictive and one small gesture can start a chain reaction of kindness according to readers of The Wall Street Journal who have written to the newspaper to tell their story.

Theresa Gale was locking up her church recently after a long day of volunteering when a young woman approached her, asking for water and bus fare. It was late and Gale was alone. But she gave the woman a bottle of water and $15 and offered her a ride to the bus stop.

In the car, the woman asked about the church, and Gale explained that the members believe that they have a duty to help those in need. “Well, you are God to me today,” Gale says the woman responded. “I was touched,” says Gaile said. “It was as if I, too, had received a blessing.”

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“When we act kindly, the systems in our brain associated with reward light up, the same ones active when we eat chocolate. They make us want to do that same awesome thing again.” -Jamil Zaki, associate professor of psychology at Stanford University