It seems to me that we talk about how we feel more than practically anything else. We feel good or bad, happy or sad, excited or discouraged, and a thousand other things. The inventory of the various ways we feel is almost endless. Feelings are ever changing, usually without notification. They don’t need our permission to fluctuate; they merely seem to do as they please for no specific reason that we can find. We have all experienced going to bed feeling just fine physically and emotionally, only to wake up the next morning feeling tired and irritable.