How does one measure happiness?
Jeremy Bentham had a motto: "the greatest happiness for the greatest number of people". He devised "Felicific Calculus" to put a number on the amount of pleasure and pain.
Bentham's method grades pleasure and pain in 4 categories : intensity, duration, certainity and
remoteness. By adding up the score one can calculate the degress of happiness or sorrow.
Economists tried to define happiness by giving some formulas. Paul Anthony Samuelson suggested a simple equation :
Happines = Consumption / Desires.
By this model, if one wants to increase happiness the one must increase consumption. This equation was criticized for stressing materialism but it reflects eudemonism more than people think.
It is the same way by which monks are able to reach happiness by reducing their desires until the very end of life.
The late US humorist James Thurber said: "Even a llama should stick to his mama". Meaning, discontent in one situation would not necessarily lead to happiness in another.
To say that, however, is not to justify fatalistic attitude. It only calls upon to delink one's inner states of mind from external fluctuations and factors. Very often we convince ourselves that our life will get better after something happens - after we get that job or contract or the relationship or.. But that does not 'fix' our happiness.
One always wants more until one realizes that there is no way to happiness. Happiness is the way!