Every once in a while a photo stops you in your tracks. Which is why thousands of people shared this image of David Douglas, a 29-year-old powerlifter, walking hand in hand with Lindsay Ratcliffe, a 12-year-old who suffers from progeria, which ages people much faster than normal. The unlikely friendship started when Douglas met Ratcliffe at a celebrity powerlifting event.

The decorated powerlifter says Ratcliffe’s strength as she battles the debilitating disease inspires him in his day-to-day life. “She has pulled me out of rough spots just by thinking of her,” Douglas told A Plus. “That is a priceless gift. That is why I made it my duty to help her out in any way that I can.”