For the tweet "#Worry, #doubt, #fear and #despair are the enemies which slowly bring us down to the ground and turn us to dust before we die.", classify the intensity of the emotion sadness. The possible classifications 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.