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: Yesterday is history, tomorrow is amystery, and today is a gift; that's why they call it the present #livelife #humbleness #smile #live
This tweet contains emotions: 
anticipation, joy, optimism