Sam Clear has witnessed the worst and best of humanity.
Over a 19-month protest walk, which took him around the world, he was mugged at knife point, threatened at gunpoint, bashed and left on the side of the road, yet also sheltered and fed by strangers who were so poor they had to beg for food from others to feed him.
By the end of his 15,600-kilometre, 568-day walk through 20 countries, he described his look of long hair and beard as a mix between Forrest Gump and Jesus.
Mr Clear addressed grade 11 and 12 students at Launceston Church Grammar School yesterday to inspire them on the 50th anniversary of the school's 80-kilometre, 24-hour fund-raising walkathon later this term.
What made this former Bracknell resident, St Patrick's College, University of Tasmania engineering student and Northern Tasmanian footballer walk around the world is not what you would expect.
He was protesting about the lack of unity between different Christian denominations.
``After graduation I did some mission work with teenagers in Sydney and at times we had to meet with different church organisations but I found there was so much anger amongst them,'' Mr Clear said.
Mr Clear can remember being asked to leave one meeting because he was a Catholic, so not a ``real'' Christian and also being witness to fights you might find in a playground.
Disillusioned by what he witnessed he sold all his worldly possessions and set off from Brazil in December 2006 with the mission to build unity among different denominations.
Today, Mr Clear makes one or two trips a year for the specialised youth and young people tour company Harvest and a division of that, called Inroads.