the definition of happiness also undergoes sea changes.
First we are happy with even small things. But we tend to ask more as time advances and only things not easy to get can make us happy.
It is something similar to taking some intoxicant.
First small dosages would give us heaven but as we get addicted we would crave for huge doses..and we proceed to points from where there are no comebacks
Initialky we manage to get happiness without making others unhappy..we do not grab and snatch.
But as our demands grow we grab snatch steal or even loot.
If our pursuit for happiness does not deprive others of their welfare pursuit of happiness is okay.
Upon God, I do not want any happiness for myself won at the cost of the tears of my neighbour
It is better to be unhappy all my life than making others miserable.