to summarise, we need to fulfill our basic needs first, according to maslow, before we can go on to successively "higher" needs,
for example, if you are hungry and sex-deprived, have low self esteem, (physical needs) you would not be able to reach your potentials career wise, in love, you would have self-esteem issues and fail to make it to the the psychological need of self actualization - to grow as a person, get my drift? so it really does depend on what you put into your tummy, hehe
going by this theory, which is, might i add, incredibly sound and logical, human beings would never be contented, or rather, remain contented
i mean, once you have a car, you want a bigger car next, once you have a pretty girl, you'd want a prettier girl or maybe two pretty girls,
hence, although contentedness is of course not synonymous with happiness, as pointed out by coelho,
it's impossible to be happy without being contented first, and the irony is that once you reach a level of contentment, your happiness would merely be in passing, and you'll once again desire for a contentment that can only be fulfilled by a higher achievement,
my point? savour your happy moments, some last for a long time, others only mere secaonds, but moments are moments, because they never last