Based on the given tweet, determine the level of joy the author is experiencing. Choose from the following options: 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.
Tweet: “Set a goal to achieve something that's so big so exhilarating that excites you &amp; scares you at the same time.” \n― #BobProctor
0: no joy can be inferred