Given the emotion joy and the tweet "'The point of living, and being an optimist, is to be foolish enough to believe the best is yet to come' - Peter Ustinov #optimism #quote", classify the intensity of the emotion displayed in the tweet. The classification options are: 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.