Big Sean bares his heart in his most personal video yet for the Kanye West and John Legend-assisted “One Man Can Change the World,” the third single off his chart-topping album Dark Sky Paradise.

The heartfelt black-and-white clip is dedicated to his late grandmother, Mildred V. Leonard, who was one of the first female black captains in World War II. She later became one of the first black female police officers in Detroit and served 30 years with the Detroit Public School System as a teacher and counselor.

Sean credits his grandmother for showing him that through hard work, commitment, perseverance, and faith that anything is possible. In her honor, he recently launched his #ItTakesOne campaign, which promotes random acts of kindness.

“I’m really excited about putting my heart into it and putting something different out there,” Sean told 7 Action News.

Watch the emotional clip below.