What is The Parhelion?

The parhelion that Filth sees out the window of his plane symbolizes the final cohesion of his dual identity. The parhelion appears like two suns in the sky, but in fact, this is only an illusion: there is only one sun. Likewise, Filth's identity has always been a cohesive whole, even when it appeared to straddle two apparently irreconcilable cultures.