"I used to be a cyclist, I used to be a keen walker.
"I bushwalked around the world ... I've rock climbed in Yosemite Valley in California up very steep cliffs.
"I've got a degree in economics and now I can't even read a newspaper, I can't turn the pages.
"I want to have the food withdrawn."
Mr Hammond, who was by his client's side, said Mr Rossiter's wishes should be respected.
"He wants to die now, not tomorrow, not next week, but he wants to die now and he wants to die without pain," Mr Hammond said.
"I think if we are to be civilised in the way we deal with people like Mr Rossiter then his wish should be granted."
Dr Nitschke congratulated the Brightwater group "for going down the path of seeking legal advice on this".
"In the meantime, of course, we've been involved in making sure Chris has got good legal representation, too, so that his rights can be reflected," he told Fairfax Radio Network.
But he warned that Mr Rossiter was choosing a difficult path if he decided to fast himself to death.
"I certainly made it clear to Chris that while it has a certain appeal - that one can simply stop eating and drinking - the idea that it's an easy road is far from the truth," he said.
Brightwater's lawyers said the care group was taking a neutral stance on Mr Rossiter's wishes.
"Brightwater is not seeking to take a position or making an application to the court that is either in opposition to or endorses Mr Rossiter's request," it said.
Brightwater chief executive Dr Penny Flett said it was a complex legal issue and court advice was being sought in order for Mr Rossiter to be provided "with the best possible care".
By Warwick Stanley and Aleisha Preedy, AAP
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