Task: Determine the prevailing emotional tone of the tweet, categorizing it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that most accurately represent the tweeter's mental state.
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