People who have a religion should be glad, for not everyone has the gift of believing in heavenly things. You don't necessarily even have to be afraid of punishment after death; purgatory, hell, and heaven are things that a lot of people can't accept, but still a religion, it doesn't matter which, keeps a person on the right path. It isn't the fear of God but the upholding of one's own honor and conscience. How noble and good everyone could be if, every evening before falling asleep, they were to recall to their minds the events of the whole day and consider exactly what has been good and bad. Then, without realizing it you try to improve yourself at the start of each new day; of course, you achieve quite a lot in the course of time. Anyone can do this, it costs nothing and is certainly very helpful. Whoever doesn't know it must learn and find by experience that: "A quiet conscience makes one strong!" — Anne Frank
A productive use of dreams to review one's day to judge whether you have been good or bad as a matter of honor and conscience.
Viewers dwelled on science and culture to explain LOST's events.
Perhaps, we should dwell more on honor and conscience to explain things.
Conscience is an inner feeling or voice viewed as acting as a guide to the rightness or wrongness of one's behavior, i.e. he had a guilty conscience about his desires.
It's meaning is from Middle English (also in the sense ‘inner thoughts or knowledge’): via Old French from Latin conscientia, from conscient- ‘being privy to,’ from the verb conscire, from con- ‘with’ + scire ‘know.’
Were the actions of the characters driven by their "inner voices" which guided them subconsciously?
If there were no conscious intent, then these characters could not be judged for their intentional actions, whether right or wrong. It would erase any religious context to the show.
Or course, psychopaths have no belief that their cruel actions are wrong. In fact, they may have convinced themselves that there actions, including murder, are justified for a greater purpose.
We never really saw any of the characters "sleep on" a major decision, then the next day change course and do the exact opposite. Most of the actors were pretty stubborn in their opinions and beliefs. In fact, critics often quipped that the characters failed to think things through before taking action.
The concept that the island was a dream factory to have the characters re-live their past actions, to judge themselves for themselves, then learn from their experiences is interesting, but flawed.