Friedrich Schiller,
Philosophical Letters of Friedrich Schiller
“ The internal chemical processes are at cross-purposes; beneficent juices lose their way and work harm in other provinces, while what is malignant may attack the very core of our organism. In a word, the condition of the greatest mental distress becomes the condition of the greatest bodily sickness. The soul is informed of the threatened ruin of the organs that should have been her good and willing servants by a thousand obscure sensations, and is filled with an entire sensation of pain, associating itself to the primary mental suffering, and giving to this a sharper sting. ”
