Life is made out of highs and lows, nothing is forever happy or sad. We are treated with malice by the dynamics of what happens in our surroundings, which have direct influence in our state of spirit. By times, we are gifted with good moments that go away all of sudden, the sudden disappearance of the aforementioned are like the side effects of the quick privation of an addictive drug, it is truthfully translated by what we call sadness.
The transition of a good state of spirit to a harmful state of spirit end by revealing the benefices of something supposedly bad on its plenitude. The changes induces us to flee from what feels bad, by working on emotional improvements, what in this case is accomplished by the search of happiness and peace of spirit, what can't be done without optimism. Seeing the good side of the diverse situations present in our lives assures the sentimental dynamic of our spirits, the highs and lows of life.
The number of cases where people don't see any more motivations to go on emotionally is exponentially rising. These end up on a emotional stagnation, ruining what is dynamic about feelings, and sinking on what we call depression. It is part of what defines a healthy emotional state the way which optimism is maintained as active as possible, even in the hardest of the situations, because it is one of the main keys of the dynamism of our feelings, and without a doubt crucial for us to keep going.