Black is beautiful (0:29)

Martin Luther King Jr. speaking in Cleveland. "I am somebody ... I am black, but I am black and beautiful."

Streetsweeper (1:23)

Martin Luther King Jr. speaking in Cleveland. "If it falls your lot to be a streetsweeper, sweep streets like Michelangelo painted pictures."

Somebodiness (0:53)

Martin Luther King Jr. speaking in Cleveland. "Develop within ourselves a deep sense of somebodiness. Don't let anybody make you feel that you are nobody."

Nonviolence (1:05)

Martin Luther King Jr. speaking in Cleveland. "Our power does not lie in Molotov cocktails ... Our power lies in our ability to say nonviolently that we aren't gonna take it any longer."

CLEVELAND, Ohio -- One day in 1967, Martin Luther King Jr. stood before a high school audience in Cleveland and spoke of nonviolence. "Our power," he said, "does not lie in Molotov cocktails. ... Our power lies in our ability to say nonviolently that we aren't gonna take it any longer."

He urged his audience to raise their ambitions. Not enough, he said, to be a good Negro doctor, or lawyer, or barber. Be the best of all. And "if it falls your lot in life to be a streetsweeper, sweep streets like Michelangelo painted pictures."

On Sunday, King's birthday, The Plain Dealer will look back at that speech and his time in the city, in words and photos. Today, we've got some short audio clips from one of his speeches here.

Listen to them -- clear recordings of his rich voice and strong cadences. Get Sunday's Plain Dealer to find out where they came from, and come back to cleveland.com for more.

Mobile readers: The audio files are below.