Perhaps the most important mystical concept ever conceived of by the human mind, is what is known as the ‘Sin of Literality’—the realization that nothing in the universe is quite as it seems, and it is Willful Ignorance, the greatest ‘sin’ of them all, to take our limited and inherently mistaken conceptions of the world at face value.
As an example, consider the concept of Sin itself. In an absolutist ontology, ‘sin’ is taken to mean any action which the likewise absolutist and literal Deity has forbidden, and the consequences of such actions lead to some form of eternal punishment. Some more flexible creeds have a graded scale of sinning; nearly all of which can be forgiven if one ‘repents’ and never commits the act again, save for a small set of ‘unforgivable sins’. But mystics have a very different understanding of ‘sin’—any action or perception which holds back your mystical and spiritual progress towards the end goal of the Great Work, achieving the state of being known as the True Self; so when you talk about the ‘sin of literality’, it is fundamental to the point to not take ‘sin’ too literally either. However, since so many more actions are known by mystics to slow, halt, or revert mystical and spiritual progress, the Mystic’s code of ethics is substantially more rigorous than even the staunchest, most devout member of fundamentalist religions. It has to be, as any act of selfishness, greed, or desire can set you back years; and every time you fall or stumble, your initiation becomes all the more difficult.