God created this world, provided a Savior for us, gives us commandments and guides, even allows us to experience hardships for the express purpose of helping us find happiness. The entire Gospel is a blueprint for obtaining lasting happiness.
Our desire for happiness ultimately drives all our actions. There are many who, in spite of failing to find happiness is wealth, power, and prestige, continue to believe that a little bit more of those things will bring the happiness they seek. But the road to true happiness is strait and narrow--if we believe strongly enough to follow that path, true, lasting, continual joy will be our reward. Such joy cannot be obtained in any other way.