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: A warm #smile is the universal language of kindness William Arthur Ward #love #kindness
This tweet contains emotions: 
joy, love, optimism