The family of Daniel Christie, the teenager killed in a one-punch attack on New Year's Eve, want his death to finally bring change to alcohol related violence.
Daniel, 18, was farewelled by more than 400 people at a funeral service at the Hillsong Church Convention Centre in Baulkham Hills on Friday.
Among those in attendance were Governor-General Quentin Bryce who told media as she entered that the "gratuitous violence" that claimed Daniel's life was inexcusable, intolerable and "unAustralian".
Remembered by his family as "a beacon of morality with a heart of gold", Daniel died last weekend when his life support was switched off, 11 days after he was knocked unconscious in Kings Cross.
His father, Michael Christie, told mourners that Daniel was not a young man who would have feelings of hate and revenge but only of love and acceptance.
In a moving eulogy, Mr Christie also urged politicians to make changes to end alcohol-fuelled violence.
He said it was what Daniel would have wanted as he was a young man who had brought so much positive change during his short life.
"Daniel would want us all to get on with our lives without adding the extra burden of carrying any negative feelings like hate and revenge.
"This is very important because it's a legacy to us all from Daniel, please do not bear this ill feelings towards others," Mr Christie said.
"It's a lesson that we all need to be retaught from time to time, so please feel nothing but love for Daniel.
"I feel it important not only to talk about change but to actively pursue change right to the end because we have to do what is right," Mr Christie told the service.
"That's what Daniel would have wanted."
Mr Christie said it was time for politicians to "set frameworks and guidelines to stop this insanity".
"If change is to be, it's up to each and every one of us," he said.
Mr Christie told the service that he was "proud beyond measure to have three fine young boys".
He urged people to carry his "happy, positive spirit in your hearts always".
Mr Christie said his son was always ready to help and had time for others.
"Violent behaviour was abhorrent to him, although in fifth and sixth grade he was bullied, never once using his considerable size advantage to retaliate; he was a gentle giant even then."
Daniel's mother, Maureen Christie, said her son was as solid as a rock, but as tender as a lamb.
"I cannot adequately express the joy I've experienced being Daniel's mother," she told the service.
Speaking outside the service, Ms Bryce said the whole country joined in giving its deepest sympathy to the Christie family and the "devastating circumstances" surrounding the death of their "very precious son".
"As Governor-General, and if I may say as a parent, for all parents, for all grandmothers and grandfathers, there is no place, no excuse, no tolerance for gratuitous violence in our society," she said.
"It's unacceptable and unAustralian."
A private cremation and wake will be held after the service.
Shaun McNeil, 25, is accused of murdering Daniel by allegedly punching him in an unprovoked attack.
Daniel's death and that of one-punch victim Thomas Kelly, also 18, at Kings Cross in July 2012 prompted public outrage and widespread calls for law changes to tackle alcohol-fuelled violence.
- with AAP