In "The Person Sitting in Darkness," Mark Twain expresses his anti-imperialist views through phrases that critique imperialism and its consequences. A notable phrase that reflects his stance is:
"We are in the act of conquering a people who have to be made to understand that they are free."
This line encapsulates his criticism of imperialist policies and the contradictions inherent in claiming to liberate while simultaneously subjugating others, which highlights his anti-imperialist sentiment effectively.