Kagan states that Pericles adopted "an elevated mode of speech, free from the vulgar and knavish tricks of mob-orators" and, according to Diodorus Siculus, he "excelled all his fellow citizens in skill of oratory". According to Plutarch, he avoided using gimmicks in his speeches, unlike the passionate Demosthenes, and always spoke in a calm and tranquil manner. The biographer points out, however, that the poet Ion reported that Pericles' speaking style was "a presumptuous and somewhat arrogant manner of address, and that into his haughtiness there entered a good deal of disdain and contempt for others".