There is much evidence that being upbeat rather than unhappy, or optimistic rather than pessimistic, is a personality characteristic that is stable throughout one’s life. One study that followed people over a 50-year period, for example, showed that having an upbeat personality as an adolescent was a strong predictor of job satisfaction decades later. Hiring such upbeat people is one of the best ways to limit destructive personal attacks, and has many other benefits as well.
…studies have examined the differences between happy and unhappy, optimistic and pessimistic people; people who have a positive effect versus a negative one; happiness versus sadness, and so on. No matter what you call it, there is strong evidence that travelling through life in a good mood is a good thing, especially if you want to be creative.
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