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: I have learned over the years that when one's mind is made up, this diminishes fear. –Rosa Parks #quotes #motivation
This tweet contains emotions: 
optimism, trust