The greatest sin is judgment without knowledge.

The line warns against condemning people or situations on the basis of incomplete information. By calling such judgment the “greatest sin,” it frames ignorance-driven certainty as not merely an error but a moral failing: it harms others, distorts truth, and encourages prejudice. The quote also implies an ethical duty to inquire—listening, learning, and verifying—before forming strong opinions or passing sentence. In a broader civic sense, it critiques snap verdicts in media, politics, and personal relationships, where confidence often outruns evidence. Its significance lies in linking epistemic humility (knowing what you don’t know) with compassion and justice.