The Reverend Martin Luther King Jr. delivers his "I have a dream" speech on Aug. 28,1963 in Washington, D.C. (File photo)

A Tennessee man has discovered a dusty box in his attic that contained a reel of his father interviewing Dr. Martin Luther King Jr.

Stephon Tull spotted the audio reel with the label, "Dr. King interview, Dec. 21, 1960."

The recording is of his father speaking to King about the civil rights movement. Experts have confirmed the reel is authentic.

King is heard discussing what non-violence means to him and why it's important for the civil rights movement.

"I would ... say that it is a method which seeks to secure a moral end through moral means," he said, "and it grows out of the whole concept of love, because if one is truly non-violent that person has a loving spirit, he refuses to inflict injury upon the opponent because he loves the opponent."

"I could not believe what I was hearing," Tull said.

Tull said his father had planned to right a book about it, however he became sick and is in a hospice.

"When I heard it, I got goose bumps all over," Keya Morgan, an expert on historical artifacts, told CNN, "It feels like he's sitting in your living room and talking to you."

Morgan is helping arrange the sale of the audio reel, hoping a museum or university will be interested in acquiring it.