Task: Determine the prevailing emotional tone of the tweet, categorizing 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 most accurately represent the tweeter's mental state.
Tweet: A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty. \n― Winston S. Churchill #quote
This tweet contains emotions: 
optimism, pessimism