Task: Analyze the tweet's emotional connotations and classify it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best portray the tweeter's mental state.
Tweet: A pessimist is someone who, when opportunity knocks, complains about the noise.
This tweet contains emotions: 
disgust, optimism, pessimism, sadness