"Fight the hatred that killed her," said Brendon Cox, husband of the Batley MP who was seemingly killed in her constituency by a toxic mix of hate and mental illness. "Hate doesn't have a creed, race or religion. It is poisonous."
So as well as offering our thoughts and prayers for Brendon, their two young children, family and friends, we will seek to offer more by supporting Jo's values of equality, human rights, peace, justice and togetherness. These values come across in what Jo herself said and in this selection of personal tributes:
"While we celebrate our diversity, what surprises me time and time again as I travel around the constituency is that we are far more united and have far more in common with each other than things that divide us." The late Jo Cox MP.
"Jo was a brilliant committed activist for social justice." Max Lawson, Oxfam.
"Jo's politics were always about bringing people together and never about creating divisions". Harriet Harman
"She was a great campaigning MP with huge compassion and a big heart." David Cameron.
"A wonderful woman who stood for many things – human rights, peace and justice...dedicated to getting us to live to our promises to support the developing world and strengthen human rights." Jeremy Corbyn