Reasons for pleasure

These reasons also fall into two categories. One of them is the category of that which suddenly changes the natural nature so that sensation arises in it; the second is the category of what immediately restores the natural connection of particles. And everything that does not happen immediately is not felt and does not give pleasure.

Pleasure is a feeling of pleasantness. Every sensation arises from a sentient force and is the sensation of being affected by it. If the effect is pleasant or unpleasant, then it is pleasure or pain, depending on what exactly is being affected. Since touch is the coarsest sense and retains the longest perceived impressions, whether unpleasant or pleasant, then for people with a coarse nature, pleasant sensations through touch give greater pleasure, and unpleasant sensations cause more suffering, than sensations inherent in other forces.

Movements cause pain when they stretch, crush or dislocate.

Bad juices cause pain either by their quality when they burn, or by their quantity when they are stretched, or by the combined effect of both of these factors.