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: 'We can throw stones, complain about them, stumble on them, climb over them, or build with them.' — William Arthur Ward. #inspiring
This tweet contains emotions: 
joy, optimism