Letter 75 — On the Diseases of the Soul (§12)

““Passions” are objectionable impulses of the spirit, sudden and vehement; they have come so often, and so little attention has been paid to them, that they have caused a state of disease; just as a catarrh, when there has been but a single attack and the catarrh has not yet become habitual, produces a cough, but causes consumption when it has become regular and chronic. Therefore we may say that those who have made most progress are beyond the reach of the “diseases”; but they still feel the “passions” even when very near perfection.”