Didn't we have this discussion a few weeks ago?
Happiness, first, is not a quantitive emotion. You cannot have more or less of it than any other person. You can be happy more or less often than other people, but you cannot obtain a greater amount.
Secondly, happiness comes from having everything that you care about. This can come in two forms:
1. You obtain everything you want.
The problem with this approach is that when you obtain something you want, you will end up wanting more, or else you will fear losing it (and so want to be rid of that fear). Therefore, obtaining the things you want ends up making happiness more difficult.
2. Removal of wanting.
This is the approach I have taken. It seems complicated, but it really isn't. Don't want things you don't need. No, I am not perfect. There are still things that I want that I don't need (my laptop would be one, but I don't worry about it, so having it is not as much of a problem as it would be for most people, but another is wanting to not be touched, which is broken far too often for my tastes), but I am far closer to this than most people. I am also happier than most people. Confucius once said, "Those who seek only coarse food to eat, water to drink, and bent arm for pillow, will without looking for it find happiness to boot."
The key to happiness, then, is to not fight it and not seek it. By seeking it, you force it, by forcing it, it moves away from you. Do not wade into a river in an attempt to correct its course. Let it move as it pleases and you shall have all the water you can drink.
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"Let reason be your only sovereign." ~Wizard's Sixth Rule
I'm working my way up to Attending Crazy Taoist. For now, just call me Dr. Crazy Taoist.