The speaker is overwhelmed by the sheer number of people who live in the city and the myriad of experiences and stories they must have. He imagines the city as a place where anything is possible and anything can happen.
The poem also speaks to the anonymity that can come with living in such a large city. The speaker feels like just one small part of a much larger whole, and he wonders if anyone really knows or understands him.
The poem ends with the speaker reflecting on the beauty of the city, despite its chaos and overwhelming nature. He finds moments of peace and tranquility amidst the hustle and bustle, and he feels a sense of connection to the millions of other people who call this city home.