In Walt Whitman's "Song of Myself," the author mentions that he "departs as air," which can be understood as a farewell, since the poem explores the idea of life and death. However, as he becomes one with the whirlpools, there is an idea of immortalization. Thus, the water represents the cycle of life.
The Forum served as a stage for Roman politicians and philosophers. It was a sort of a square where people gathered to hear these politicians and philosophers speak.