Task: Assess the emotional content of the tweet and classify it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best represent the tweeter's mental state.
Tweet: After becoming boiling hot, after slowly melting, my heart is frozen.
This tweet contains emotions: 
anger, joy, optimism, sadness