There is so much truth in your words, thank you!
I think the impossibility to become fully content is also due to historical reasons. The post-war generation learned to push forward and re-build what others had destroyed. During the process a lot of them forgot how to enjoy free-time, relax and be fullfilled by what they have. When I look at my father I see that: he never ever stops, good is not good enough and success is not really celebrated. When that happens, I hug him and say: 'Hey, c´mon! You´ve done really well. Be happy, daddy!' Then he starts laughing and (supposedly) forgets about the pressure... for at least 5 minutes :-))

Happiness is a decision. I am totally convinced that happiness is found by the ones who are ready to receive it...

Again, thanks for your post, really inspiring!