Given the emotion sadness and the tweet "At my age all I see is gray. Is it gray because of my bad eyes or my perspective #depression  #healingjustice", classify the intensity of the emotion displayed in the tweet. The classification options are: 0: no sadness can be inferred, 1: low amount of sadness can be inferred, 2: moderate amount of sadness can be inferred, 3: high amount of sadness can be inferred.
3: high amount of sadness can be inferred