There are four types: the cretin, the imbecile, the stupid and the mad. Normality is a balanced mixture of all four.
Umberto EcoI would define the poetic effect as the capacity that a text displays for continuing to generate different readings, without ever being completely consumed.
Umberto EcoLiving the same sorrows three times was a suffering, but it was a suffering to relive even the same joys. The joy of life is born from feeling, whether it be joy or grief, always of short duration, and woe to those who know they will enjoy eternal bliss.
Umberto EcoThe pleasures of love are pains that become desirable, where sweetness and torment blend, and so love is voluntary insanity, infernal paradise, and celestial hell - in short, harmony of opposite yearnings, sorrowful laughter, soft diamond.
Umberto Eco