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: #PiersGough on thoroughly lively and imaginative developers—“Sager have always challenged us to do better and do better.” @IslingtonSq
This tweet contains emotions: 
joy, optimism, trust