Task: Determine the prevailing emotional tone of the tweet, categorizing it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that most accurately represent the tweeter's mental state.
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