Complex sentence: It is, however, for his Cynic-style "diatribes" that he is chiefly remembered, for he satirized the foolishness of people, attacked religion, and eulogized philosophy.
Split into simpler sentences: It is, however, for his Cynic-style diatribes that he is chiefly remembered. He satirized the foolishness of people, attacked religion, and eulogized philosophy.