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The Sophists claimed to teach wisdom, but Socrates didn't like their business model.
Sophists had to draw crowds and depended on donations from rich and powerful patrons to support extravagant lifestyles, so they couldn’t make truth their first master.
Socrates observed that even the even well-intentioned Sophists began to tell audiences what they wanted to hear when the truth wasn’t going over very well.
You'd have to be blind not to see this among modern politicians, media personalities, and influencers. Many are more concerned with having influence than whether or not what they say is true.
In his journal, Marcus thanked the gods that "I did not fall into the hands of any Sophist," as a young man, and any untrained person is equally vulnerable today.
Stoicism trains us to spot false beliefs and purge them in preference for the truth, and it's just as effective today as it was in Marcus’s day.