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: I've learned to let go of resentment for people who have hurt me, because keeping it is like swallowing poison and expecting them to die.
This tweet contains emotions: 
anger, optimism