Classify the emotions found in the tweet "Even death is unreliable. Instead of zero it may be some ghastly hallucination, such as the square root of minus one.  Samuel Beckett". 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".
disgust, fear, pessimism, sadness