As a fellow person that lost his faith, Eastern Orthodoxy to be precise, not saying Christianity because this particular cult is a beast of its own, I'm trying to approach morality with the rule of thumb - inflict as little suffering as possible.
In regard to the so called personal sins you can start thinking if they are really imoral things that one does or just actions that someone avoids just because he wants to comply to a certain ideology.
In regard to the so called personal sins you can start thinking if they are really imoral things that one does or just actions that someone avoids just because he wants to comply to a certain ideology.