Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: “Optimism may sometimes be delusional, but pessimism is always delusional.” —Alan Cohen #believe
This tweet contains emotions: 
optimism