These two cases illustrate the two simple feelings, pleasantness and unpleasantness. Most situations in life are either pleasant or unpleasant. Situations may sometimes be neutral; that is, may arouse neither the feeling of pleasantness or unpleasantness. But usually a conscious state is either pleasant or unpleasant. A situation brings us life, joy, happiness. We want it continued and act in a way to bring about its continuance. Or the situation tends to take away our life, brings pain, sorrow, grief, and we want it discontinued, and act in a way to discontinue it. These two simple forms of feeling perhaps arose in the beginning in connection with the act of taking food. It is known that if a drop of acid touches an amoeba, the animal shrinks, contracts, and tries to withdraw from the death-bringing acid. On the other hand, if a particle of a substance that is suitable for food touches the animal, it takes the particle within itself. The particle is life-giving and brings pleasure. =The Emotions.= Pleasure and displeasure are the simple feelings. Most situations in life bring about very complex feeling states known as _emotions_. The emotions are made up of pleasure or displeasure mixed or compounded with the sensations from the bodily reactions. The circulatory system, the respiratory system, and nearly all the involuntary organs of the body form a great sounding board which instantly responds in various ways to the situations of life. When the youth sees the pretty maiden and when he touches her hand, his heart pumps away at a great rate, his cheeks become flushed, his breathing is paralyzed, his voice trembles. He experiences the emotion of love. The state is complex indeed. There is pleasantness, of course, but there is in addition the feeling of all the bodily reactions. When the mother sees her dead child lying in its casket, her head falls over on her breast, her eyes fill with tears, her shoulders droop, her chest contracts, she sobs, her breathing is spasmodic. Nearly every organ of the body is affected in one way or another. The state is _unpleasant_, but there is also the feeling of the manifold bodily reactions.