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: Always borrow money from a pessimist; he doesn't expect to be paid back.
This tweet contains emotions: 
optimism, pessimism