"...but most of all beware this boy, for on his brow I see that written which is Doom." The warning to "beware this boy" is particularly chilling. The Ghost suggests that Ignorance is the more dangerous of the two, as it leads to doom. This implies that a lack of knowledge and understanding can have devastating consequences, potentially leading to societal collapse. The word "Doom" is a strong word choice, signifying a grim fate.