Classify the emotions found in the tweet "@MHChat if we don't understand how to express our emotions to others, may lead to sadness / loneliness &amp; neg impact on long term mh #MHChat". 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".
pessimism, sadness