For the person who has nothing to say, it is comforting to be able to say it correctly. The teacher who isn't doing anything wrong isn't doing it right. I seldom read a dictionary. Neither dawn nor dusk can be hurried or delayed. They come in their time regardless of the plans you've made.
Slang is satire slung at the sins of speech.
If one is to hide behind language, big words and long sentences are suitable. A language without slang is either dead or humorless. Take your time, if you're sure the time is yours. Human beings did not invent fire. Fire created human beings.