GOOD

“ Good has two meanings: it means that which is good absolutely and that which is good for somebody. ” - - - Aristotle

Double meanings. It is a writer's diversion to trick the reader's mind to lead them to an unexpected reveal. The trick is not to so confuse the reader; but to set a mental trap to spring on them at the climax of the story.

LOST had many good characters. Characters that were good to other people. Characters who looked for the good in other people. Rose and Bernard were probably the best examples of that type of character.

LOST also had characters who did good deeds. They helped other people. They sacrificed themselves (their time, resources, capital) to help others. Jack would be such an example because as a doctor, he gave up much of his personal life to save other people from traumatic injuries. Even on the island, he gained instant support of the group by going around helping the survivors.

LOST had one absolute pure good person. One that was not tainted by life. He was too young to comprehend the things around him. He was unique in island history. Aaron had purity in his soul when he was born on the island. 

Then LOST had characters who used "good for somebody's benefit."  One vein would be an altruistic person, unselfish. There entire lives would be devoted to service of another person. Richard Alpert saw the goodness in Jacob's speech to become his immortal island liaison. Alpert sacrificed his chance of moving on in the after life (to be with his deceased spouse) to be a Jacob's side against MIB. It is odd that MIB, knowing about Alpert's loyalty to Jacob, would not have eliminated him from the island power dynamic. Was Jacob's power of "immortality" a means of stopping MIB from destroying Alpert or his soul?

Then we had LOST characters who used the term "good" in order to manipulate others to do their bidding. The master of this craft was Ben. He kept telling the survivors he was "one of the good guys" while at the same time terrorizing the camp. He had a brutal reign of a dictator under the guise of a higher purpose. In order to keep order, such a person uses "good" as the brand for their personal evil.

So the plot of LOST was a cloudy vision of what was "good." That is part of the perplexing situation that the overall story does not have a moral base. There is no life lesson learned by the characters. There is no punishment for evil acts. The whole concept of what is "a good person" is rendered moot. There is no great revelation in the sideways world on how the various "good" characters in the series got their heavenly reward. All the different elements were merely thrown back together in a church.