Task: Determine the dominant emotion in the tweet and classify it as either 'neutral or no emotion' or one of the eleven provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: #RIP30 Heaven is rejoicing because they've gained an angel, the Keifer family are in my prayers 💙🙏
This tweet contains emotions: 
joy, love, optimism, sadness