I've mentioned before how I believe Reformed/Evangelical legalists equivocate between happiness and joy in a way that destroys people's motivation and self-esteem. I'll briefly revisit that, and then propose a definition of joy that is distinct from happiness and helps put this teaching in perspective.
The sermons on joy seem to go in a definitional circle. First, joy is promoted as an essential of the Christian life [i.e. a legalistic requirement]. If you do not have joy, you cannot be a Christian, because the life of the Christian is a life of joy. Then, joy is juxtaposed with happiness [equivocation part 1] - that is, the non-Christians seek "happiness" [a fleeting emotion], not "joy" [which at this point is some ethereal, non-fleeting emotion and will never be defined] and that is ultimately a worthless endeavor. Examples of joy are given. People are described in terms indistinguishable from happiness. Paul sang in prison, martyrs sang while being burned, people work demeaning jobs with a smile on their faces. Examples are paraded of people who were not brought down by horrible circumstances The unstated definition of "joy" throughout is "spiritual, deep, non-fleeting happiness". This is then brought full circle by the reiteration that we Christians should experience joy in all circumstances, which as far as we can understand from the sermon equates to, "Christians need to "look and feel happy", no matter the circumstances." Sometimes there is even the claim that God provides harsh circumstances for the Christian to put us face to face with our lack of joy.
The conclusions are that: (1) joy is deep, emotional happiness, exemplified by a happy demeanor. (2) The church has no responsibility to encourage or create joy in us because the way to create joy is to put us face-to-face with our lack of joy. (3) We should not try to avoid or change joyless circumstances, other than find a way to divorce our emotions from our worldly circumstances.
My definition: Joy is an emotional response of being a valued member of a larger group.
I like this definition because it shows how the Reformed church misses it completely.
1) Our joy in Christ. We Reformed Christians are supposed to find joy in our relationship with Christ and God; however, the Reformed church destroys our sense of value. Yes, we are adopted heirs, whatever, but when it comes to value, the church shoves Total Depravity in our faces. Worm Theology is ultimately one that removes our joy by making our relationship with God one that is valueless. Yes, in a sense, we are not worthy. That is true! BUT! In Jesus we are MADE WORTHY! We can claim worth and value through Christ. The church blurs and ignores that message to maintain abusive control.
We should have joy in Christ, because we are a valued part of God's redemptive plan. He loves us and wants to overflow our lives so that our joy can flow into others. While I do believe that God can remove our joy in something that is replacing our joy in him, I don't believe that is a primary method, especially in a church/family system where shame and legalism are present. Imagine the story of The Horse and His Boy, but instead of Shasta, newly discovered son of the king and heir to the throne, being treated like royalty, the king says, I need to treat you like a slave so that you can find your own joy within. NO! He was treated like a slave his entire life, why would the king treat his son like that?
I'm not a fan of John Piper, who I think follows the same approach, but read a Neocalvinist rebuttal of Piper:
Do true believers, who have turned toward God in repentance, and come to Christ in faith, and know the joy of sins forgiven, seek after happiness? Of course not! They have been redeemed by the precious blood of Christ, adopted into the family of God, and know God as their heavenly Father; their names are written in the Lamb’s book of life; they are risen with Christ, and they seek those things which are above, for ‘their life is hid with Christ in God’ (Colossians 3.1-4). Believers are exhorted to ‘put on the new man, which after God is created in righteousness and holiness’ (Ephesians 4.24). The joy of serving the risen Christ is the greatest joy known to man this side of heaven. True believers do not seek after worldly happiness, for they know the blessings of their heavenly Father.
There is not one hint of value here, only legalistic duty and, quite frankly, the juxtaposition of happiness and joy (Do true believers ... seek after happiness?) suggests that the mere thought of Christians desiring happiness is evil. (Another equivocation, mind you, now happiness and joy are opposites!)
2) Our joy in the Church. The visible church is an organization that seeks to provide a place of growth and service for the individual Christian. The church should demonstrate and represent Christ's love to the world, but also to the individuals. We should receive joy as part of the church to see how God builds up his saints and how our individual gifts contribute and matter to the greater good. It is fundamentally joy destructive for Christians to be treated as unnecessary or unimportant or sideline observers in the church, yet this is a tenet of the Neocalvinist church where the "ministers" do the ministry and the laity obey their leaders and praise them at every opportunity.
This is also why authoritarianism is so tempting in the visible church. People desire joy and see their leaders as being joyful because they are fulfilling their ministerial call, so they want to be leaders themselves. We have a lot of people becoming leaders simply because the church does not value non-leaders. Not only that, but when non-leaders complain about a lack of joy, they are told that their relationship with God should be their source of joy and they are unrighteous to seek joy within the church - an equivocation, and unspeakably evil.
3) Our joy in the family. Our family is our closest bond and common purpose. The church should be encouraging parents to raise their children with joy - meaning that the children are valued, their purposes are valued and that they are an important part of the family mission. Instead, the church teaches a system of emotional and physical abuse where the children are taught that they are worthless and don't matter. Parenting books talk about breaking the will, they talk about the child being constantly at odds with God, they talk about the need to downplay their accomplishments and punish every infraction. Children are taught "I'm third" - God first, others second, me third - a message dripping with worthlessness.
So, why are we surprised that every RP generation is a lost generation. When we are, at every turn, beaten away from a sense of hope and purpose, and it is replaced with reminders of our own worthlessness and inability, it's not surprising that there will be many that will seek hope and purpose outside the RPCNA.