Task: Determine the prevailing emotional tone of the tweet, categorizing it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that most accurately represent the tweeter's mental state.
Tweet: “Optimism may sometimes be delusional, but pessimism is always delusional.” —Alan Cohen #believe
This tweet contains emotions: 
optimism