How does a human being become such a happy being?

I think you mentioned one magic word which is 'contentment'. Yes, I believe this is one important key to one's search for happiness. We may ask, why would we think that many highly successful and many rich and famous people aren't content? I think usually these kinds of people who are overly ambitious are always looking for more and more success when they get some already, so they don't seem to have time to celebrate the success that they have already achieved. That way it became difficult for them to be content because they never stop looking for more success and were never satisfied. To make things clear, I am not saying all successful, rich and famous people are like that...I am just saying many of them are. There would always be exceptions to the rule.

That is already a fact that successful people do not let their fortune would run down that they have to strive more that their happiness is blocked by their desire to achieve more earnings than they have acquired the other days they start.If they are just contented of what they have achieve they could just be that richer and could never be too rich,yet of their cravings for more fortunes no matter how sad they were as long as they can have all the money they like to earn,so it is better to earn for more.

Yes, I guess many people have the tendency to ask for more and more. It is true that being content with whatever we have and attained in life is one good guarantee for happiness, and what happens with some people is that they succeed in one field and they think it's not good enough and is not happy about it, then he tries to attain more. No matter what level of success he achieves, the attitude 'it's not enough' makes that person discontented and unhappy. I have a good feeling this happens a lot with several highly successful people.

This leads me to the saying that happiness is not the destination but a journey. Some people I know would say that 'I would be happy the moment I ___fill in the blank___, and this is one good example of making the destination their source of happiness. Let us be happy while we're in the process of solving our problems, trying to earn more, trying to improve ourselves and our surroundings and whatever process we are undergoing right now. Happiness is a journey, not the destination.

I read read somewhere with the definition of success saying that 'happiness is getting what you want', while others would say 'happiness is being content with whatever you have'. This gives me a conclusion that happiness is subjective, so what makes you happy may not make me happy and vice versa. This also leads me to a question, isn't there any universal meaning of happiness and if yes what is it?