Analyze the following tweet to determine the level of sadness expressed. The levels 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.
Tweet: It takes less #muscles to #laugh than to #frown - stops facial &amp; mental aging too! Laugh strongly &amp; often to #lead effectively! #leadership