Task: Determine the prevailing emotional tone of the tweet, categorizing it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that most accurately represent the tweeter's mental state.
Tweet: As the birds chirp and the cows moo we need to listen to the sound of nature to ensure that all is well.
This tweet contains emotions: 
joy, optimism