What defines happiness?

In the 2006 movie, The Pursuit of Happiness, staring celebrated actor Will Smith and based on the real life endeavours of Chris Gardner, the actor defines ‘happiness’ as ‘probably something that we can only pursue and maybe we can actually never have it no matter what’, that despite how hard we pursue it or chase it, it’s not a destination and that the journey could just be it.
The New Times
Times Reporter