Hope does everything for you.
You attain something because you've hoped for it, not always because you need it, and that brings us towards fulfillment.
The happiness from attainmentt, THAT is a derivative of hope. Hope causes pain, it causes anguish. The hopes of those whom think they know what's best causes social progress, it helps us to pay attention, to consider others and things about them that we would not normally consider. The hopes of Countries, of people, are what make us strive for fixing the problems that we have. The answers, we don't always agree on, but hope has at least thus far driven us to a better place.
Every good thing done in life was fostered by a hope.
(Part III Sunday or Monday Night, just depending)