An important characteristic of feelings consists lastly in the fact that they combine themselves into an affective process, which as a rule is joined to an ideational process. A temporal process of this kind with an affective and ideational content, that changes but is nevertheless joined together, we call an emotion, or with less intensity and a more lasting nature of the feelings, a disposition. Joy, delight, merriness, hope are emotions in which the predominant feeling is pleasure; anger, grief, sorrow, and fear are emotions in which displeasure predominates. Now in both these series of emotions the exciting and quieting feelings and the feelings of strain and relaxation in many cases often play an important part. The quieting feeling combined with displeasure we call depression. Joy and anger are exciting emotions, grief and fear are depressing, hope, sorrow, and fear are straining. When, however, an expected result takes place, or when the emotion of fear disappears, a strong feeling of relaxation generally occurs. Many emotions are also characterised by a fluctuating affective process, sometimes changing in intensity and sometimes in quality. Anger, hope, and sorrow in especial show great fluctuations in intensity. With hope, fear, and sorrow we very often find fluctuations in quality. Hope and sorrow often change between themselves, and in most cases increase in intensity because of this contrast. Especially with the emotions we can perceive this affective process objectively in the movements of the mimic muscles of the face, and when the emotions are very strong in the other muscles of the body. These so-called mimic and pantomimic "expression movements" are always combined with characteristic changes of the movements of the heart and lungs. They are in so far the most sensitive characteristics of these subjective processes, since they can be observed even with the weakest emotions and even with the simplest feelings, that have not yet been bound together into an affective process. The expansion and contraction of the small blood-vessels, especially of the face, that often happens in a state of emotion, must also be mentioned here. In anger and shame we notice blushing, and in fear and fright pallor.