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: We musn't allow bitterness and anger to make our hearts infertile to God’s gifts.
This tweet contains emotions: 
anger, joy, optimism