I do agree with her statement. But depending on the circumstances, I think it may be impossible to truly forgive another person, especially if a loved one has been taken by a senseless act of violence. Interesting time to answer this question after the mass shooting in Boulder Colorado yesterday. I don't know how a person whose loved one was killed or seriously injured could 100% forgive the shooter, for example.
There are so many reasons why someone might take the life of another and if brave enough, a survivor can explore the reasons. Mental illness is often a contributing factor and while this is not an excuse for a person's actions, it may help work toward forgiveness.
Forgiveness can be very freeing.