Task: Determine the dominant emotion in the tweet and classify it as either 'neutral or no emotion' or one of the eleven 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