You'll find that pretty creatures can do ugly things to people.

Of all the wonderful artistic imagery captured by cinematographer Freddie Young for David Lean's 1965 production of Doctor Zhivago, there has always been one shot in particular which for me transcends to the level of sheer poetry, and that is this one:

A single smear of blood on snow, from the massacre of the freedom protesters on the very street running before the Gromeko home.  Encapsulated in this one image is the loss of innocence of three main characters in the story: Yuri, who learns firsthand the brutal facts of the world he is living in when he witnesses, to his horror, the ruthlessness of the Czarist police against the common people; Pasha, who loses his political naivete and from that point becomes a hardened, committed Bolshevik; and Lara, who is seduced and deflowered by the villanous Komarovsky.  The blood smear also foreshadows the coming revolution and the White/Red civil war following in its wake.