Probably the most important or best known abstracts are the various Deaths: Deaths of Youth and Old Age, Disease, Violence, Faceless and Shameful Death (Suicide).
Many abstracts are a result of shameless (mis)quoting and nodding towards poets and bands.
Sorrow has a human heart,
Jealousy the human face,
Terror the human form divine
And Secret the human dress.
Guilt and Regret, two in-bred brothers of Hate - and their little sister Hope.
Eternity, older than Time, a transparent lady. Memory the old storyteller with contempt for books.