A specific quote about the dangers of an oversized government has been widely attributed to Thomas Jefferson, the 3rd president of the United States. It wasn’t him. In fact, a great many quotes attributed to Jefferson -- including the one about a “government big enough” -- have nothing to do with him at all!
Whether you’re giving a rollicking good speech or writing the next great American novel, being effective comes down to using the right words. Discerning the “right” words from the “wrong” ones can be hard and often comes down to your own voice and goals, but replacing filler words with more advanced terms (what some people like to call “big words”) is a great place to start.