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: @torbalan I still have some shred of optimism. It's rapidly disappearing however...
This tweet contains emotions: 
optimism, pessimism, sadness