PASSIONS ARE PRODUCED BY EXTERNAL IMAGES; AND THEIR AVOIDANCE IS THE TASK OF PHILOSOPHY.
5. If then, from the very start, the soul undergo no affections, what then is the use of trying to render her impassible by means of philosophy? The reason is that when an image is produced in the soul by the affective part, there results in the body an affection and a movement; and to this agitation is related the image of the evil which is foreseen by opinion. It is this affection that reason commands us to annihilate, and whose occurrence even we are to forestall, because when this affection occurs, the soul is sick, and healthy when it does no occur. In the latter case, none of these images, which are the causes of affections, form within the soul. That is why, to free oneself from the images that obsess one during dreams, the soul that occupies herself therewith is to be wakened.[47] Again, that is why we can say that affections are produced by representations of exterior entities, considering these representations as affections of the soul.