Based on the tweet "“The #optimist proclaims that we live in the best of all possible worlds; and the #pessimist fears this is true.” ~ James Branch Cabell", categorize the level of sadness felt by the author. Select from the following: 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.