Oprah Winfrey: How Martin Luther King Changed My Life

01/20/2008 at 11:55 PM EST

Oprah Winfrey is paying tribute to Dr. Martin Luther King Jr. in a special episode of her show airing Monday. In this video clip shot in conjunction with the special, Winfrey, 53, stands on the steps of the Lincoln Memorial – where King delivered his "I Have a Dream" speech – and talks about the impact he had on her life.

"Nothing that has happened in my life since I was 16 years old would've been possible. I wouldn't have been in radio, I wouldn't have been on television, I would have been have been who I am... I just wouldn't have the life that I have without Martin Luther King Jr.," she says. "To have been a living witness to the changes his vision and his dream have brought – not just for me personally but for me personally – it really is amazing grace."