Montaigne

Montaigne's writing sounds very philosophical.  His opinion is written as fact, which works to make his argument strong.  He often uses "I" and speaks of himself, making this more personalized. 

"As to the rest, I have enjoined myself to dare to say all that I dare to do; even thoughts that are not to be published, displease me; the worst of my actions and qualities do not appear me so evil, as I find it evil and base not to dare own them."

This is written somewhere between a high and middle style I'd say.  It reminds me almost of Shakespeare, and reads quite poetically.  

Montaigne often drops historical names, know worldwide, which serve to make his argument even stronger.

"I am very much of Plato's opinion, who says that facile or harsh humors are great indications of the good ill disposition of the mind.  Socrates had a constant countenance, but serene and smiling, not sourly constant, like the elder Crassus, whom no one ever saw laugh.  Virtue is a pleasant and a gay quality."

Here Montaigne shows his knowledge of these world-known individuals gives him a sense of credibility to his readers.  He is showing that he knows what he is talking about.  He shows confidence.  it can seem as if he is being pretentious about his knowledge, but I believe it is effective in making his argument stronger.