@mismi,
That's right, helping others makes one happy for having done something completely free of ulterior motives. The "thank you" might not come from the
same person per se, but it will come from others who help you in many ways
you would not have expected. So the old saying "what goes around, comes around" is certainly true.
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Happiness is different for every person, the key is to find what makes you
feel good and content.
maporsche, I think you're an a cross road in your life (mid 30 I guess), you're
getting married very soon, probably will have children down the road and
then your priorities and your life will change. Once you have kids, you will
find that one night without any interruptions of baby crying will make you
happy. You will find out that much simpler things will give you pleasure.
Then there are some people who are extremely happy not having kids,
it truly is an individual feeling of what drives you and what gives you pleasure in life.
I also would stay away from such books who are way to generic to follow.
I am sure there are good pointers here and there, but basically should be
an insight to a different life perspective only.