Limbless evangelist Nick Vujicic is currently promoting his new book "Life Without Limits," hoping that it will inspire people to reflect on their relationships and what makes them happy and gives them a sense of fulfilment.

"You can live a life without limits — but you can't live life without trusting relationships. That's why you should always self-monitor and work to refine the ways you engage with those around you," he writes on his Facebook page.

In the book, he wants people to ask themselves: "What would your life be if anything were possible?" After which, he offers some practical advice on how people can attain true fulfilment and happiness.

"I do believe my life has no limits! I want you to feel the same way about your life, no matter what your challenges may be. As we begin our journey together, please take a moment to think about any limitations you've placed on your life or that you've allowed others to place on it. Now think about what it would be like to be free of those limitations," he says.

It is truly inspiring how Vujicic is able to maintain his positive attitude on life despite his obvious limitations. Simple daily activities that people take for granted such as walking and scratching one's back are more challenging for the Australian-born speaker because of his tetra-amelia syndrome, a rare disorder characterised by the absence of all four limbs.

At one point in his life, Vujicic even contemplated suicide because he was always bullied and did not fit in. But he changed his life drastically when he met God, and found his calling as a motivational speaker.

He has now fully accepted his condition and is happily married to wife Kanae Miyahara. They already have two healthy baby boys named Kiyoshi James (born in 2013) and Dejan Levi (born in August 2015).