[Adolf] Guggenbuhl-Craig lists and elucidates five primary symptoms of eros-invalids [absent-hearted people]: inability to love, a missing or deficient sense of morality, absence of any psychic development, background depression (a lifelong lack of meaning, lack of hopefulness or a sense of growth), and chronic background fear (they do not trust the world).
— Gail Godwin, Adolf Guggenbuhl-Craig, Heart by Gail Godwin