In this video by Buzzfeed, Coss Marte narrates the story of how he went from drug-dealing to transforming his life while in prison. After leaving prison, he became the CEO of Conbody, an innovative gym that hires ex-cons as personal trainers. In the video, he explains how he came to realize “my purpose was to give back, instead of destroying the people around me.”

Watch the video to hear his incredible story.