Assess the level of the emotion sadness in the tweet provided. Use the following categories: 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.
Tweet: @BlurtAlerts 'the darkest of nights can be bright, the solemn of faces lights up with a smile'. -@Totemprince believe in me, as I do in you
0: no sadness can be inferred