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: After becoming boiling hot, after slowly melting, my heart is frozen.
This tweet contains emotions: 
anger, joy, optimism, sadness