Task: Analyze the tweet's sentiment and assign it to either 'neutral or no emotion' or one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: Defining yourself in terms of opposition, i.e. the clouded mirror phenomena, is almost always a mistake.
This tweet contains emotions: 
anger, anticipation, disgust, pessimism