If you analyze "revelations" (Mahomet's, David's, John Smith's, ...) you will realize that they are full of inconsistencies and the only logical explanation is that they were invented to control you.
Any good idea that explains the Universe can appear as obvious truth now, but should be revisited if scientific advances disprove it, such as Earth is flat.
The Universe is geared towards evolution. From particules to atoms, molecules, planets, life, intelligence. Intelligence is the highest state of evolution I can think of.
Societal improvement is as important as individual improvement. Only we can define what it means to be human, and only we can steer the course of civilization. For however much time humanity has in the universe, we must all work together to guide the ship to the brighter shore.
No feature of the universe may be more inscrutable than the fact of your own existence. Life is rare. Life is short. Life is precious beyond measure. There is no afterlife. One chance at life is all any of us gets. Remember that for your sake and for the sake of those around you.
As a means for apprehending truths about existence, believing without evidence is a severely unsound approach. Wishing and gut feeling no matter how strong or heartfelt are insufficient, unreliable, and far too easily misleading to justify believing in extraordinary claims.
Some people are more fortunate than others. If we can remember to lift as we climb, as Angela Davis once said, we can form a chain fence that grows horizontally and vertically at the same time. Seeing others in need and offering assistance can start a chain reaction of goodness.