Emotions are a part and parcel of life. It is not uncommon for most of us to experience emotions of happiness as well as sadness at various times in our lives. For most of us, these episodes of joy and sorrow are relatively short lived, and justified. In other words, we feel them for a short while, and for a specific reason. But this statement doesn't hold true for approximately 0.4% to 2% of the population, who suffer from what is called Bipolar Disorder.