Many people's so-called depression ultimately boils down to two things: either they can't see hope, or they feel they've been treated unfairly. Essentially, it's all a rupture between expectations of reality and actual reality. Sometimes, the problem isn't the situation itself, but how you perceive it. As long as you can "shift your perspective"—change your angle, extract yourself from personal gains and losses—many emotions will loosen their grip. If you pull your perspective back even further, standing on the principles of how the world operates, even observing nature and how animals survive: competing for resources, survival of the fittest, it's simply how things are. When you truly understand this, many of life's difficulties no longer seem so insurmountable. Not because the world has improved, but because you no longer demand it meet the standard of "must be fair, must go smoothly."