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: Like keep grinding boy your life can change in one year, and even when it's dark out the sun is shining somewhere...'
This tweet contains emotions: 
optimism