How we cite our quotes: (Book.Chapter)
Quote #1
He does not realize that it is sufficient to concentrate solely on the divinity within himself and to give it true service. That service is to keep it uncontaminated by passion, triviality, or discontent at what is dealt by gods or men. What comes from the gods demands reverence for their goodness. (2.13)
Marcus is speaking here of the man who is always "out and about" looking for ways to figure out what his neighbors are thinking about him. Instead, this guy should be nurturing that little spark of divinity (reason) that has been give to him as a gift from the gods. If a person can live a life that cultivates the mind—rather than giving a flip about more earthly concerns—he makes a grateful return to the Whole for giving him rational capacity.
Quote #2
And see that you keep a cheerful demeanour, and retain your independence of outside help and the peace which others can give. Your duty is to stand straight—not held straight. (3.5)
Marcus is a big proponent of self-sufficiency. This is something that comes from within, since a person cannot remain independent from the chaos of earthly life unless he or she insulates his or her mind from it.
Quote #3
At the break of day, when you are reluctant to get up, have this thought ready to mind: 'I am getting up for a man's work. Do I still then resent it, if I am going out to do what I was born for, the purpose for which I was brought into the world? (5.1.1)
We all know what it's like to face Monday morning head on. Apparently, that's been a thing since ancient times. Marcus approaches his reluctance as an incentive for an attitude adjustment, since it's actually his duty as a human being to get up and at 'em. This is the most positive that Marcus ever really gets, understanding as he does his place in the universe and the purpose of his existence.