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: Use your smile to change the world. Don't let the world change your smile.' #quote #actorslife  #love #hardworkpaysoff #fun
This tweet contains emotions: 
joy, love, optimism