Maybe there should be a health warning label for those who are negative and pessimistic about life.
Consider another pioneering research on marriages by John Gottman. 700 recently married couples were interviewed 15 minutes each. Then based on a ratio of 5 to 1 (5 positive remarks to 1 negative remark), they predicted whether each couple would stay together or divorce. Ten years later - the results were stunning - they had predicted divorce with 94% accuracy - based on scoring the couples' interactions for 15 minutes.
So - watch the negativity of your tongue - it could be a better indicator of your quality of life than you think. Think about it - what comes out of your mouth could be more detrimental than what goes into it.
(Source : How Full is Your Bucket by Tom Rath and Donald Clifton)