God does want the believer to be Biblically happy, although this happiness is different from the world's understanding. Biblical happiness is not dependent on circumstances. Secondly, mankind's purpose is to glorify God. But how does happiness, Biblical or worldly, fit into the purpose of God?
Romans 8:28 (KJV)
And we know that all things work together for good to them that love God, to them who are the called according to his purpose.
This well-known verse of Scripture is often used to point out that God intends that all things in our lives work together for good. This is true. It is also important to understand that this promise is for those who are of the called, the believers in Yeshua. This calling and the good that results are all according to His purpose, the glorifying of God. Therefore, the meaning of "good" is determined not by what we necessarily think is good, but rather by those things that ultimately glorify God.
This is then what determines the circumstances in the believer's life. Only those things that will glorify God are allowed by God to happen.
Unfortunately, some segments of the church have translated this into a gospel that teaches that God's desire is for believers to be wealthy, prosperous, and without illness. This is false. We live in a fallen world. There are earthquakes, tornadoes, extremes in temperatures, floods, pestilence, and illness. Ultimately, we all die. There is also evil and sin. Man is pitted against man. Even believers choose sin over obedience to God. This world can be scary and terrible, filled with difficulties and misery that we have thrust upon us, or even fall into because of our own sin, or poor (but not sinful) choices.
Yet, God works with and through the fallen world we live in. And for Christians, we have that confidence that even though God allows tragedy in our lives, we know that what we go through somehow fits in God's purpose of His glorification. How can this be? How does the believer's misery glorify God?
Although we don't comprehend all the workings of God, some examples can help in our understanding. It is a fact, that when the church is persecuted it grows more and is more spiritually healthy than when life as a Christian is easy. Going through extreme pain from injury or illness allows empathy for others and causes focus to be on God rather than worldly goals. Even martyrdom serves as an impetus for church growth.
In some ways, this still might seem to contradict what God has promised us as believers.
Philippians 4:19 (KJV)
But my God shall supply all your need according to his riches in glory by Christ Jesus.
It is hard to imagine that persecution, pain, sickness, tragedy, and death constitute "supplying all your need." This is where that supernatural gift of Biblical happiness or joy comes in. Believers can experience Biblical happiness in the most trying and difficult times! Let's also look critically at the sum total of our lives. Can we admit that God has also blessed us with times of worldly happiness as well?
What then is God's responsibility to believers overall? If His ultimate purpose is His glorification, what is He trying to accomplish in us?
God's overriding responsibility and desire is to create a people for Himself. He is molding believers into a holy people by whatever means is necessary. If persecution or tragedy will do this, God will use it. It is what is good and necessary. You see, God is more interested in getting the believer ready to be a member of His Kingdom than of providing worldly happiness.
Hebrews 8:10 (KJV)
For this is the covenant that I will make with the house of Israel after those days, saith the Lord; I will put my laws into their mind, and write them in their hearts: and I will be to them a God, and they shall be to me a people:
Romans 8:29 (KJV)
For whom he did foreknow, he also did predestinate to be conformed to the image of his Son, that he might be the firstborn among many brethren.