Examine the tweet "Yesterday is history, tomorrow is amystery, and today is a gift; that's why they call it the present #livelife #humbleness #smile #live" and determine which of these emotions are present: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. If there are no identifiable emotions, reply with "neutral or no emotion".
anticipation, joy, optimism