In the Caged Bird, the poem is mainly about freedom and slavery.

The caged bird is only a metaphor for what Angelou is trying to show with her poetry. ... This serves as the central metaphor for the poem. The cage bird represents a slave, one who is limited with their own freedoms.

The author presents Prejudice in the first stanza as an obstacle. Not only does it stop her from continuing with her mission, but it also blocks her view so that she cannot appreciate what lies ahead. It is likely that her "important business" was living her life, and working towards improving society.

She goes on to say that the "hulking Prejudice sat all accross the road." Her choice of words demonstrates that she thinks Prejudice is not only in her way, but that it is annoying and useless. The annoyance at prejudice is only increased by her description of the importance of her mission and the difficulty it involves. She also remarks on the size of Prejudice, which she repeats afterwards ("huge and high," "colossal," etc.).

When the author says that she "argued like a Solomon" but "he sat there like a fool" she is highlighting how Prejudice can remain alive even in the face of evidence and logical arguments. Her allusion to Solomon refers to the biblical story of the judgement of Solomon (1 Kings 3: 16-28).

Towards the end, the author has an epiphany, and she gathers courage and walks right through Prejudice. The implication towards the end of the poem is that Prejudice (in this case, likely about the roles of women in society) is only an obstacle if you let it be. Also, she implies that it is pointless to fight against it. Instead, you should ignore it, and continue with your life and your plans as if it was not there.