Task: Evaluate the tweet for emotional cues 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 indicate the tweeter's state of mind.
Tweet: .@POTUS Obama describes his temperament as 'steady &amp; on the buoyant side.'
This tweet contains emotions: 
joy, optimism