01/14/2013 10:52 am ET

Nick Vujicic's Inspiring Story Of Triumph (VIDEO)

Born in Australia without arms or legs, 30-year-old Nick Vujicic has become an international symbol of triumph over incredible odds. His inspiring YouTube videos have been watched over 100 million times. In this clip from "Oprah's Lifeclass," Nick talks with Oprah and Pastor Rick Warren about his road to self-acceptance.

"It's a lie to think that you're not good enough," Nick says. "It's a lie to think that you're not worth anything."

For years, Nick was harassed and tormented at school. When he was 10, he attempted suicide. After years of feeling worthless and alone, Nick's awakening came while reading an article about a disabled man who refused to let physical limitations hold him back. In that moment, Nick says, he discovered the power to take control of his life -- and he has.

Today, Nick surfs, snorkels, golfs, and plays soccer. He's traveled to 44 countries with his message of hope. "Even the worst part of your life can come together for the good," he says.

And less than a year ago, Nick Vujicic married the love of his life and danced at his wedding.

"For me in my life I'm thinking, Man, I'm not gonna get married. I can't even hold my wife's hand. What connection am I going to have? But you know what? All things come together for the good for those who love Him."

Oprah asks Nick how he was able to take what the world might look at as a "bad hand" and change it around into a source of strength.

"Being born without arms and legs-- it's all about choice," he says. "You asked me what it was? I had parents who were my heroes. They always said, 'You can either be angry for what you don't have or be thankful for what you do have. Do your best and God will do the rest.' I knew that I could be unstoppable."

Hear more of Nick's story on "Oprah's Lifeclass," Jan. 13 at 9 p.m. ET on OWN.