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: 'It is not uncommon for #people to spend their whole life waiting to start living.' ~ Eckhart Tolle #happiness #live
This tweet contains emotions: 
joy, optimism