Classify the emotions found in the tweet "The man who is a pessimist before 48 knows too much; if he is an optimist after it, he knows too little.'\n-Mark Twain". Select from the following: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. If the tweet is emotionless, reply "neutral or no emotion".
optimism, pessimism, trust