Optimism, pessimism, and mental health https://t.co/0YAPpxp96B https://t.co/b1ZWd4EpML

Optimism, pessimism, and mental health https://t.co/0YAPpxp96B http://pic.twitter.com/b1ZWd4EpML

— Jerry Rosser (@psychologyofjoy) November 1, 2017