Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: A warm #smile is the universal language of kindness William Arthur Ward #love #kindness
This tweet contains emotions: 
joy, love, optimism