Task: Categorize the tweet's emotional expression, classifying it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that reflect the tweeter's state of mind.
Tweet: Wrinkles should merely hide where frown have been.  - Mark Twain
This tweet contains emotions: 
anticipation, optimism, trust