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: @leighsteinberg April 25th, 2010 for me. Keep up the good work!! #sober #prouder
This tweet contains emotions: 
joy, optimism, trust