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: Be quick to #listen, slow to #speak, and slow to #anger.
This tweet contains emotions: 
anger, joy, optimism, trust