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: The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails.
This tweet contains emotions: 
joy, optimism, pessimism