Anthony Foster left a legacy "pushing justice" for child sex abuse survivors in the Catholic church, his state funeral in Melbourne has heard.
Brian Foster, with his sister Carol Burckhardt, spoke of their beloved brother who loved his family.
"His greatest campaign is on child sex abuse for people in the Catholic Church. This is his legacy, pushing justice," Mr Foster told the funeral on Wednesday.
"The personal cost to Anthony and (his wife) Chrissie has been enormous."
Mr Foster, 64, was a tireless advocate for their daughters Emma and Kate, who were raped by an infamous pedophile at their primary school during 1988 and 1993.
But he died last month after a suspected stroke.
Victorian Premier Daniel Andrews said Mr Foster won't ever be forgotten "as his legacy will continue to guide his way forward".
"He was a man who loved, who cared and fostered," he said.
Mr Andrews praised Anthony and Chrissie Foster's "extraordinary courage".
"They had faced their own tragedy, a betrayal of trust and then denial," he said.
"Then remarkably the Fosters dedicated their lives to fighting on behalf of every victim. Fighting for every childhood taken and every family broken."
ABC radio's Jon Faine hosted the service and read an email from sex abuse survivor Patrick, who said the Fosters were "unconscious mentors" while he went through trauma.
More than 1000 people remembered Mr Foster at the funeral at the Melbourne Recital Centre.
His friend Alan Worthington spoke of a generous man, who always kept his humour despite adversity.
Mrs Foster accepted the state funeral on May 28 to commemorate a man who "quietly and profoundly changed Australian history".
The family had copies of Mrs Foster's co-authored book, Hell on the Way to Heaven, available for guests to take outside the service.
