1) There’s nothing to forgive! Ask all you like. Some answers will take longer, though, or even be blocked by the dreaded NDAs. If a mortal doesn’t worship a specific deity in life, they are not Faithless. The Realms is… #Realmslore

2) …pantheistic, not monotheistic. If a mortal doesn’t worship ANY deities at any time in life, rejecting gods as not worthy of worship or as “not gods,” they ARE Faithless (Kelemvor judges), and their fate is to be bound into… #Realmslore

3) …the Wall of Faithless by a green mold that only binds Faithless into the wall. Over time, the soul of a Faithless dissolves into the Wall, and is lost forever. However, demons steal souls from the Wall, dissolving the mold by… #Realmslore

4) …various means, and take them back to the Abyss (this is one way that demons propagate). If a demon steals a soul from the Wall that any deity is interested in, for any reason, that deity may send servitor beings to battle the… #Realmslore

5) …demon and wrest the soul from it, giving that soul ‘another chance’ in a new body. This often happens to adventurers, or spellcasters who in life devise new spells, or anyone who does something creative and daring. They are… #Realmslore

6) …reborn into a new body and life, as the deity who ‘rescued’ them watches to see what they do in this new life. (Mortals provide the main source of entertainment for the gods.) Kelemvor judges some souls to be False rather than… #Realmslore

7) …Faithless. These are the souls of mortals who deliberately betrayed deities after making a commitment to those deities. The False are punished for all eternity (which sometimes means forever, but in very rare cases means… #Realmslore

8) …until a deity sends servitors to ‘harvest’ them for a new life [again, another chance for the soul]. The severity of punishments fit the severity of the crimes against the deity during life, and vary from hideous tortures… #Realmslore

9) …that would result in death if done to a live mortal (like slow dismemberment), to attentively escorting and caring for visitors to Kelemvor’s City of Judgment that the soul in life would dislike or despise (e.g. due to family… #Realmslore

10) …or racial hatreds). Kelemvor himself has been known to (for unknown reasons) pluck certain souls away from the usual fates of his judgments, to serve him. Often they end up sent back into mortal life on missions, often in… #Realmslore

11) …bodies of a different race and/or gender than that of their previous life. #Realmslore

Isn't there any way for a mortal who doesn't like the gods, or consider them to be worthy of worship (like Artemis Entreri or the Netheril people) to avoid being slapped on the wall? I ask because Artemis is my favourite book character and I'd be really sad if that was his fate.

There are several ways, but they must be roleplayed (e.g.: a mortal's fate, or being reborn to work on, being vital to a divine purpose). Many gods consider mortal deeds to be worship, even if the mortal didn't intend them so. The Netherese spurned gods, so: the Wall. #Realsmlore

What about the dragonborn of Tymanther, who spurned all gods, but were venerating a dead Untheran god (though they didn't knew he was a god). And, given the case, what about people who venerates dead gods? Who picks them up.