Task: Categorize the tweet's emotional expression, classifying 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 reflect the tweeter's state of mind.
Tweet: The abysmal ignorance, frivolity and levity of the Italian priests stupefied him.' - Roland Bainton on Luther, #ReformationDay
This tweet contains emotions: 
anger, disgust