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: Do not be discouraged by a slowing sales market. This will test your business model and pinpoint #strengths and #weaknesses.' @Ken_Dunn
This tweet contains emotions: 
optimism