At the age of 8, Vivienne Harr began selling lemonade and raised more than $101,000 for Not For Sale, which fights child slavery. She went on to sell her lemonade in stores, with proceeds benefitting anti-slavery causes.

"Service—giving to another another, having their back—is what makes the highest performing teams in the world, not their strength, and not their intelligence," Simon Sinek said. "It's their willingness to be there for each other."

A little boy named Isaiah and a woman named Angela became friends when the two met at a football game. At one point, Isaiah climbed into her lap and fell asleep. His family was concerned he was bothering her, but she insisted that he was no bother. Isaiah's aunt said she loved Angela and what she did for him.

When actor Jason Segel was asked if he's ever concerned about giving too much of himself to others, he said it's important not to give to others who are just there to take. "It's the cycle of giving and receiving and giving and receiving that is what friendship is supposed to be about, so that you never get emptied out," he said. "It's the rich exchange of love."

Former neo-Nazi Michael Kent's life changed when a Black parole officer named Tiffany Whittier was assigned to him. Kent became friends with Whittier, moved on from his past, and covered up his swastika tattoos. "I'm not here to judge him," Whittier said. "That's not my job to judge. My job is to be that positive person in someone's life."