Task: Categorize the tweet's emotional expression, classifying it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that reflect the tweeter's state of mind.
Tweet: Bill Clinton: 'Do not grow weary of doing good.' @ClintonGlobal #CGI2016
This tweet contains emotions: 
joy, optimism