Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: What's the worst affliction that you or someone you know ever convinced yourself you had?
This tweet contains emotions: 
pessimism, sadness