The Pope says he has prayed this morning for victims of clerical abuse.
He asked for forgiveness for the scandal and betrayal felt by many.
In a number of unscripted remarks in his speech in Knock he says he was moved by the stories of young people and children who were robbed of their innocence and left scarred by the actions the church.
Pope Francis met last night with a number of victims of abuse in Dublin and spoke to them for almost an hour and a half.
He said the church must be decisive in how it deals with abuse.