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: Shantosh: How crazy would it be to walk past and talk to a person everyday never realizing he is suffering from depression or such? …
This tweet contains emotions: 
pessimism, sadness