Task: Categorize the tweet's emotional tone as either 'neutral or no emotion' or identify the presence of one or more of the given 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