English Style 1: Parallelism

"Parallelism" is both a grammatical term and a stylistic one.

Consider: "His wit will make you smile; his cruelty will make you cringe." <--This is a parallel expression because the sentence uses parallel descriptions of facial expressions, for "smiling" and "cringing" are opposites.

Descriptions in a list use parallel form: "There is a way he walks, a way he speaks, that attracts others to him."

--use equivalent things to express ideas

"All of his tests were either frustratingly easy or exhaustingly difficult." <--I'm not sure that this is a good sentence, but you see how the parallelism works: both descriptions use an adverb and an adjective.

Ideas do not have to connect as directly as above to be expressed in parallel form.
Neil Armstrong's moon walk quote: "It's one small step for a man, one giant leap for mankind." (i.e. I have done a small thing, but it has large significance).

More examples:

There were many couples at the Beitou Station McDonald's. Some were lovers, and some were spouses. Some were newlyweds, and some had been together for a long time. Some were flashy in their affection toward one another, and some were quietly happy with each other's company.
[Here you'll note that the second sentence sounds odd because it isn't parallel like the first and third sentence. You might also find the third sentence too wordy.]

The nightmarkets are visited by the rich and the poor, the local and the tourist, the quiet and the gregarious.