Its like all you quotes keeps reminding me of what i have read and come to learn in life.
A chinese proverb i came across said

IF YOU WANT HAPPINESS

If you want happiness for an hour-
Take a nap

If you want happiness for a day-
Go fishing

If you want happiness for a month-
Get married

If you want happiness for a year-
Inherit a fortune

If you want happiness for a lifetime-
HELP OTHERS

In my opinion the essence of life (to make money, loads of it, to have kids, to have a beautiful wife or husband, to live a hundred years) is to achieve fulfilment, ultimate happiness. That is what every human should chase and in achieving this One has to put others into consideration before ones self.

SELFLESSNESS