Burnham, ever since she has let her hair down, has been about principles but her time in the 32nd Century has allowed her to see life in a more complex way. Episode 8 entitled "All In" has her moving into more of a gray area, not of morality per se but of purpose. Things can't always go by the book (pun intended)

The trevails of Episode 6 of "Star Trek: Discovery" actually introduced a different motif to the universe which actually comes about as a right turn in many ways to the ideals that were initially being discussed.

The aspect of sacrifice often resounds in the nature of protection. While the 4th season of “Star Trek: Discovery” hasn't been as episodic as one would like, it does play into a certain aspect of the unknown depending on what lore one subscribes to.