Arya Stark being able to miraculously find a way out of King’s Landing was without a doubt symbolism, but of what? The white horse could be a reference to the story of the Four Horsemen of the Apocalypse from the Bible, which includes the verse: “I looked, and there before me was a pale horse! Its rider was named Death, and Hades was following close behind him.” While Arya has cheated death many times throughout the series, she’s also brought it upon many. (In the books, pale mare is a plague, but it’s also mentioned in a prophecy delivered to Dany by Quaithe: “The glass candles are burning. Soon comes the pale mare, and after her the others. Kraken and dark flame, lion and griffin, the sun’s son and the mummer’s dragon. Trust none of them. Remember the Undying. Beware the perfumed seneschal.”) We’re not sure what this means for the assassin in the finale, but it looks like Arya still has some things to do.