"Limbless evangelist" Nick Vujicic has attested that witchcraft is real after he drew some fierce reaction to his story about seeing "10-foot-tall demons" in his hotel room in San Francisco.

During his recent appearance on "The Billy Hallowell Podcast," Vujicic was asked about his recent comments on Facebook Live back in January when he shared his experience with the spiritual realm to explain why he is not an atheist.

"I can't show you God, I can't show you an angel, but one of the reasons why I'm not an atheist, and one of the reasons why I don't believe science explains everything, is because I have seen miracles, and I've seen demons," Vujicic said during the Facebook Live discussion.

"I've seen 10-foot-tall demons, 5-foot wide walk in through my San Francisco hotel room/ And I felt the demon's presence, demonic presence, before the demon actually walked through the wall. And so when you understand that science can't explain everything ... there is a spiritual realm," he added.

When Hallowell asked Vujicic to provide more details on his story, the evangelist contended that people must realize that there is a spiritual realm and shared some of his other past experiences.

The popular Christian speaker further described the massive size of the demons he saw in San Francisco, and went on to share another story about his recent Uber ride. The evangelist narrated that he felt a "spiritual demonic oppression" while he was in the vehicle and found out when he got out of the car that the woman had Satanic-themed stickers on the front of the car.

Vujicic, who recently published a new book titled, "Be the Hands and Feet," also spoke to Hallowell about his personal story of overcoming depression and how he became a world-renowned evangelist.

He recounted that he was born and raised in a loving home by his parents who had immigrated from Yugoslavia to Australia. He became the first disabled child to go into the mainstream school system of Victoria in Australia, but he went into depression at the young age of eight as he contemplated "tragic thoughts" about his life and future.

After a failed suicide attempt at age 10, the inspirational speaker recounted that he was only able to get out of his depression two years later. He later read about the biblical story of the man who was born blind in John 9, which affected him profoundly.

"No one knew why he was born that way. Jesus said it was done so that the works of God will be revealed through him," he said.

Vujicic became an inspirational speaker by age 17 and he has been travelling the world sharing his story about how he overcame the odds, while inspiring young people to persist through their own challenges.

He now leads Life Without Limbs ministry, which has reached millions of people across the world. In October 2017, Vujicic reported that his team had witnessed 400,000 people repent of their sins and decide to follow Jesus Christ at an event in Ukraine.