Classify the emotions found in the tweet "I'm strong 'cause I'm weak\nI'm beautiful 'cause I know my flaws\nI'm fearless 'cause I've been afraid\nI can laugh 'cause I've known sadness..". 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".
joy, optimism, sadness, trust