In simple terms, the quote suggests that imprisonment strips away all unnecessary abstractions and leaves only the core essence of one's beliefs and principles. It forces individuals to distill their complex ideas about ethics, history, philosophy, and personal identity into practical actions that are evident in everyday behavior.
On a deeper level, this statement implies that confinement serves as a crucible for refining one’s worldview. It challenges prisoners to examine the fundamental aspects of their existence—such as what they consider right or wrong, how they perceive themselves within society's historical context, and what philosophical beliefs guide their lives—and forces them to act in accordance with these distilled principles. This process can lead to profound self-reflection and a clearer understanding of one’s true values, often revealing discrepancies between theoretical ideals and actual conduct.
The quote is from Joseph Brodsky, an acclaimed Russian poet and essayist who was exiled from the Soviet Union before eventually settling in the United States. Known for his insightful explorations into literature, philosophy, and the human condition, Brodsky himself experienced periods of forced labor and exile that influenced much of his work, including this poignant reflection on how incarceration reshapes one’s inner world.