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: 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