Task: Categorize the tweet's emotional expression, classifying it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that reflect the tweeter's state of mind.
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