Who said "We must be ever vigilant against human sabotage."?

This quote is attributed to Napoleon.

We must be ever vigilant against human sabotage. - Napoleon

"We must be ever vigilant against human sabotage."

Napoleon Fear

Character in Animal Farm

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"The traitor Snowball"

"Do not imagine that leadership is a pleasure"

"Snowball had plotted with Jones all along"

"We must be vigilant against our enemies"

"Face your fears with courage."

"You can't live your life in fear."

"Snakes. Why'd it have to be snakes?"

"Fear is just another obstacle to overcome."