Nick Vujicic is an Australian motivational speaker and author, born on December 4, 1982, in Melbourne. He was born with a rare condition called tetra-amelia syndrome, which means he has no arms or legs. Despite these challenges, he has inspired millions around the world with his positive outlook on life and his message of hope. Vujicic founded the organization Life Without Limbs, which aims to help people overcome their difficulties and find purpose. He has written several books, including Unstoppable and Life Without Limits, sharing his experiences and encouraging others to embrace their uniqueness and live fulfilling lives.