William Zinsser said this quote

But the secret of good writing is to strip every sentence to its cleanest components. Every word that serves no function, every long words that could be a short word, every adverb that carries the same meaning that's already in the verb. every passive construction that leaves the reader unsure of who is doing what-these are the thousand and one adulterants that weaken the strength of a sentence. And they usually occur in proportion to education and rank.