Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: “Don’t burn out; keep yourselves fueled and aflame. Be alert servants of the Master, cheerfully expectant.' Romans 12:11-12
This tweet contains emotions: 
joy, optimism, trust