Ética, Parte III, Proposición 14
If the mind has once been affected by two emotions at the same time, it will, whenever it is afterwards affected by one of these two, be also affected by the other.
Demostración
If the human body has once been affected by two bodies at once, whenever afterwards the mind conceives one of them, it will straightway remember the other also (II. xviii.). But the mind's conceptions indicate rather the emotions of our body than the nature of external bodies (II. xvi. Coroll. ii.); therefore, if the body, and consequently the mind (III. Def. iii.) has been once affected by two emotions at the same time, it will, whenever it is afterwards affected by one of the two, be also affected by the other.
Benedict de Spinoza, The Ethics (Ethica Ordine Geometrico Demonstrata), traducido del latín por R. H. M. Elwes.
Publicado por primera vez en The Chief Works of Benedict de Spinoza, vol. II (London: George Bell and Sons, 1884).
Esta traducción es de dominio público en Estados Unidos, donde se publicó en 1884, y en cualquier lugar donde el plazo de derechos de autor sea la vida del autor más 100 años o menos; su traductor murió en 1892.
La división en unidades, los títulos y la ubicación de las notas son de este sitio.
Texto digital: Project Gutenberg eBook #3800