Task: Identify the primary emotion conveyed in the tweet and assign it to either 'neutral or no emotion' or one or more of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best capture the tweeter's mental state.
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