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: @RickHoffman_ And we are all so grateful for your perseverance! Happy Anniversary twin!
This tweet contains emotions: 
joy, love, optimism