Years ago , walking through downtown Seattle, I saw a sandwichboard sign on the sidewalk. It read, "free personality test." Feeling that my personality was due for a good testing, I decided to bring it in and hang around while they looked it over. It didn't pass, but the mind mechanics assured me that they had the parts on hand to effect repairs. In explaining what they intended to do, they told me that the goal was "happiness". 

"And what is happiness?" I asked.

" Why, happiness is getting what you want, no matter what that is". I was skeptical of the definition, but couldn't say why. I gave their system a shot. They sat me down in a chair across from another warped personality, and instructed me to ask him if fish were inclined to swim. If he evaded the question, I was to warn him that I was about to ask again. If he answered, I was to thank him sincerely, and commence to asking about the fish again. This went on for several days. "Do fish swim?" "Do fish swim?" "Do fish..."  Once I had soundly established the slippery habits of fish, I gathered up my personality, and left the shop. I was not happy.
Is happiness getting what you want? What about the proverb, "Be careful what you wish for. You might just get it?" I want to smoke cigarettes. An orderly at a hospital told me of seeing a dying cancer patient holding a cigarette to his trachea tube, and inhaling. I want to drink. My family was shattered by alcohol induced violence. Name the poison served at your particular happy hour; there is a list of side effects to go with it.
The Bible tells us, "The flesh wants things that are against the Spirit and the Spirit desires things the the flesh avoids." Can we assume that the supreme being is supremely qualified to define what happiness is? Of course. If I want what he wants for me will I be "happy"? Mostly. My flesh won't get its way, but the true me, the me who is new in Christ will be forever merry.  I may not get the thrill of smoking through a trachea tube, but I will know an equilibrium and serenity that exists within the heart of God. God wants me for himself and Himself for me. For this reason He became man, took to the cross, and embodied the source of all unhappiness, and suffered its consequences for all humanity. For Him, happiness is eternity with you .Most people really  don't know what they want. They try many things to satisfy a stubborn thirst, unaware that satisfaction awaits them in Jesus Christ.  And here's the big secret that God wants us to shout from the rooftops: "He is your deepest desire and your true happiness."