The concentration camps, by making death itself anonymous (making it impossible to find out whether a prisoner is dead or alive), robbed death of its… - Hannah Arendt

What's the use of falling in love if you both remain inertly as you were?

For the lesson of such stories [of resistance to Nazi atrocities] is simple and within everybody's grasp. Politically speaking, it is that under conditions of terror, most people will comply but some people will not, just as the lesson of the countries to which the Final Solution was proposed is that "it could happen" in most places but it did not happen everywhere. Humanly speaking, no more is required, and no more can reasonably be asked, for this planet to remain a place fit for human habitation.

Understanding is often a prelude to forgiveness, but they are not the same, and we often forgive what we cannot understand (seeing nothing else to do) and understand what we cannot pardon.