Task: Analyze the tweet's emotional connotations and classify it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best portray the tweeter's mental state.
Tweet: Not by wrath does one kill, but by laughter.  Friedrich Nietzsche #friedrichnietzsche
This tweet contains emotions: 
joy