When we take stock of the people who matter most to us, there are the spouses, the family members, the best friends, the partners. And then there are the people who aren’t any of those things, but who change our lives anyway.

Classical Violinist David France came to realize that students from low-income backgrounds could excel just as much as wealthy ones, if they have the right teacher.

11-year-old Ruby asked residents at a nursing home to list their three wishes. What they said - and what she did next - surprised everyone.

Almost three years ago, Norah Wood, 6, helped Dan Peterson, 84, through his grief. Today, their friendship is still as strong as ever.

When Michael Connor saw a burning car on the side of the road, he stopped to see how he could help. He didn't expect to save a child's life seconds before a disaster.

In 2014, Melissa Turner went above and beyond the bond of sisterhood to become a surrogate for her identical twin, Jen. Five years since the birth of Jen's own twin girls, the sisters have experienced tremendous joy and unimaginable tragedy.

José Bou went from solitary confinement to college professor and youth mentor.

A young man fled his country for the U.S. after his life was threatened. He lost everything and spiraled into a deep depression. That's when a family stepped up to help him rebuild his life.

When David Pradel was going through a hard time, Nate Edwards was there to help. But David didn't know that Nate was suffering from depression, too.

Six years ago, Dylan Siegel thought of a way to help his friend living with a rare liver disease. Now, his idea is funding life-changing scientific research.