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: That moment when you look back and realise you've been a #selfish #horrible #judgemental person. #FeelingAshamed
This tweet contains emotions: 
anger, disgust, pessimism, sadness