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Knowledge is power — not as an abstract virtue but as a practical fact. The man who understands the tides commands the harbour. The physician who understands infection prevents the plague. The engineer who understands materials builds the bridge that does not fall. All the great wonders of the world have been achieved not by men who knew more than others, but by men who knew differently — who had observed more carefully, argued more honestly, and refused to accept inherited error as permanent truth.