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: Chris would take full responsibility and would want us all to rejoice in the memories we all had with him.
This tweet contains emotions: 
joy, love, optimism, trust