Describe symbolism in It's Kind of a Funny Story by Ned Vizzini

In Part II, the Brooklyn Bridge is established as an important symbol for Craig. The structure connects his childhood home of Manhattan, where he remembers being happy with his map Anchors, and his current home in Brooklyn, where his life is falling apart. He also sees the bridge as a way of connecting his current life to what he hopes his future life will be -- playing some yet undetermined but significant role in the city.