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: we never taste happiness in perfection, our most fortunate successes are mixed with sadness. #success  #perfection #fortunate #mixed
This tweet contains emotions: 
joy, optimism, sadness