"Some have said this trial will go down in history. Maybe it will, maybe it won't."
He said it is not possible to judge how the trial will be seen in the future.
"It is not a matter that should trouble you or deflect you from your duty."
Justice Hansen said the prosecution case was that the group was preparing to commit serious violent offences as a back-up plan to Tuhoe negotiations with the Crown.
However, Iti's lawyer Russell Fairbrother argued the group was teaching bushcraft skiills and Kemara's lawyer Jeremy Bioletti said they were learning security skills so young people could get jobs overseas.
Justice Hansen said that was for the jurors to decide.
"Maybe there are two worlds as Mr Fairbrother has suggested but there is one law - the law that binds us all and under which you must reach your verdict."
The fact that firearms charges against 14 co-accused had been dropped was not a factor in their decisions, Justice Hansen said.