Hercule Poirot: [thinking as he walks through the train towards the bar car] My Dear Colonel Armstrong, finally, I can answer your letter, at least with the thoughts in my head and the feeling in my heart that somewhere you can hear me. I have now discovered the truth of the case and it is profoundly disturbing. I have seen the fracture of the human soul. So many broken lives, so much pain and anger giving way to the poison of deep grief, until one crime became many. I have always wanted to believe that man is rational and civilized. My very existence depends upon this hope, upon order and method and the little grey cells... but now perhaps I am asked... to listen instead... to my heart.
[pauses]
Hercule Poirot: [addressing the passengers in the bar car] Ladies and gentlemen, I have understood in this case that the scales of justice... cannot always be evenly weighed. And I must learn for once, to live with the imbalance. There are no killers here, only people who deserve a chance to heal. The police have accepted my first solution to the crime: the lone assassin who made his escape. I will leave the train here to conclude formalities. You are all free to go. May you find your peace with this... May we all.
[exits train]