Positive Thinking Can Make You Calm, But Also Lazy and Ineffectual

http://bigthink.com/ideafeed/positive-thinking-can-make-you-calm-but-also-lazy-and-ineffectual
When we see the future through rose-tinted lenses, we are less likely to take the action necessary to achieve our goals, according to New York University psychology professor Gabriele Oettingen.
In studies performed in the U.S. and Germany, Oettingen found that when people felt more self-assured about their future, whether "college students wanting a date, hip-replacement patients hoping to get back on their feet, graduate students looking for a job, [or] schoolchildren wishing to get good grades," fantasizing about future successes reduced the likelihood of attaining them.