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