Task: Evaluate the tweet for emotional cues and classify 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 indicate the tweeter's state of mind.
Tweet: One of the great/horrible moments as a professor is seeing a wonderful student leaving your university to pursue his/her true passion.
This tweet contains emotions: 
joy, pessimism, sadness