People who seek to deceive others can be deceived themselves best summarizes the theme of this passage.
What makes someone deceitful?
Someone who is dishonest, deceitful, or fraudulent. Being referred to as dishonest is not a praise because dishonest statements are deceptive and dishonest people frequently lie to or deceive others.
People may say that a dishonest company is dishonest, just as a politician with two fronts is dishonest.
Thus, option C is correct.
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