"To be happy, the passions must be cheerful and gay, not gloomy and melancholy. A propensity to hope and joy is real riches; one to fear and sorrow, real poverty." David Hume
Happy people tend to get job promotions before their 
sour coworkers, and they tend to make more money, according to an article in WorkBytes. They also tend to be happier, which is as it should be. No one likes working with grouchy complainers.
Dr. Sonja Lyubomirsky researched hundreds of scientific studies “and concluded that happiness can lead to job success rather than simply follow it.”
In one study, college freshmen were surveyed about their happiness levels, then interviewed again 16 years later. The ones who were “cheerful” in college were earning around $15,000 more than contemporaries who were not rated “cheerful.”
Another study “of nuns whose happiness level was gauged at age 22 found that the happy ones lived nearly a decade longer.” That should give us all something to be cheerful about.
