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: My heartbeat is forever stumbling on memories of things past. #longing #loss #shape #form #sadness
This tweet contains emotions: 
disgust, sadness