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