Nick Vujicic — Australian Clergyman born on December 04, 1982,

Nicholas James Vujicic is an Australian Christian evangelist and motivational speaker born with Phocomelia, a rare disorder characterized by the absence of all four limbs. As a child, he struggled mentally and emotionally as well as physically, but eventually came to terms with his disability and, at the age of seventeen, started his own non-profit organization, Life Without Limbs. Vujicic presents motivational speeches worldwide which focus on life with a disability, hope and finding meaning in life... (wikipedia)

Hope and purpose in this world is living as best as you can and maybe having life that gives back. But simply giving back isn't purpose; it's a branch of purpose, but it is not the trunk or root of the tree.
I challenged God. I said, 'God, I know that I'm a sinner. I know that I won't probably have peace until You're in my heart. But I will not let You in my heart until You answer me, why? Why did you take my arms and legs? Why didn't You give me what everybody else has? God, until You answer me that question, I will not serve You.'
When kids run up to me and ask, 'What happened?' I just lean over and whisper, 'Cigarettes.' And once I was in a car and this girl at traffic lights was giving me the eye. She could only see my head, so I decided to do a 360 in the car seat to freak her out. Her face was like, 'Whoa, what is going on?' She sped off really quickly.
Bullies want to abuse you. Instead of allowing that, you can use them as your personal motivators. Power up and let the bully eat your dust.
Often people ask how I manage to be happy despite having no arms and no legs. The quick answer is that I have a choice. I can be angry about not having limbs, or I can be thankful that I have a purpose. I chose gratitude.