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: Wrinkles should merely hide where frown have been.  - Mark Twain
This tweet contains emotions: 
anticipation, optimism, trust