Task: Assess the emotional content of the tweet and classify 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 best represent the tweeter's mental state.
Tweet: Keep #smiling because life is a beautiful thing and there's so much to #smile about. #MarilynMonroe #KeepSmiling
This tweet contains emotions: 
joy, love, optimism