When you listen to a mystic’s harangue on the impotence of the human mind and begin to doubt your consciousness, not his, when you permit your precariously semi-rational state to be shaken by any assertion and decide it is safer to trust his superior certainty and knowledge, the joke is on both of you: your sanction is the only source of certainty he has.
There are no more uses of "harangue" in the book.
Show samples from other sources
My parents continuously harangue me about my grades.
She fears a Card Check law would permit unions to pester, harass and harangue employees who would lose the protection of a secret ballot.