“The fifth psychological influence is envy. However negative the force of greed might be, always spurring people to strive for more and more, the impact is even stronger when they compare themselves to others. This is one of the most harmful aspects of what we call human nature. People who might be perfectly happy with their lot in isolation become miserable when they see others do better. In the world of investing, most people find it terribly hard to sit by and watch while others make more money than they do.”
—Howard Marks.
