Based on the tweet "Keep a relentless eye on your goals! Perseverance, joyful dedication, and unwavering focus will get you @AmyLeighMercree", categorize the level of joy felt by the author. Select from the following: 0: no joy can be inferred, 1: low amount of joy can be inferred, 2: moderate amount of joy can be inferred, 3: high amount of joy can be inferred.