Step 1: Understanding the Concept:
This question is a direct quote or a concept from the chapter "Nelson Mandela: Long Walk to Freedom." It tests your understanding of Mandela's philosophy on freedom and oppression.
Step 2: Detailed Explanation:
In his autobiography, Nelson Mandela states that both the oppressor and the oppressed are robbed of their humanity. He famously writes, "A man who takes away another man's freedom is a prisoner of hatred; he is locked behind the bars of prejudice and narrow-mindedness."
According to this philosophy, the oppressor is not free but is a 'prisoner' of his own hatred and prejudice.
Step 3: Final Answer:
The correct word to complete the sentence based on the text is 'prisoner'.