In the context of the extended metaphor of the caged bird, the quotations can be analyzed for their figurative meanings as follows:
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“But a bird that stalks / down his narrow cage / can seldom see through / his bars of rage”: This line symbolizes the constraints and limitations that the caged bird (representing individuals or groups facing oppression) experiences. The "narrow cage" signifies confinement, both physically and metaphorically, such as restrictions on freedom, opportunities, and expression. The "bars of rage" suggest the anger and frustration that come from being trapped and unable to see beyond one’s current situation, indicating that the bird's (or oppressed individual's) perspective is clouded by its circumstances.
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“The caged bird sings / with a fearful trill / of things unknown / but longed for still”: This line conveys the deep yearning for freedom and hope that exists within the caged bird despite its confined existence. The "fearful trill" reflects the mixture of hope and apprehension the bird feels when it sings, representing the longing for liberation and the unknown possibilities beyond its cage. The phrase "things unknown but longed for still" emphasizes the desire for a better future, a life beyond confinement, despite the uncertainty and fear associated with that aspiration.
Together, these quotations illustrate themes of confinement, longing, and the interplay between hope and despair in the face of oppression.