Task: Analyze the tweet's sentiment and assign it to either 'neutral or no emotion' or one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: At my age all I see is gray. Is it gray because of my bad eyes or my perspective #depression  #healingjustice
This tweet contains emotions: 
sadness