It seems like Dan makes two points in this post. First, he’s saying that it’s possible to do certain activities without the involvement of the Holy Spirit. Second, he’s saying that a “real church” (as demonstrated in Scriptures) cannot operate without the Holy Spirit.
For the first point, Dan says:
We can sing songs without the Holy Spirit.
We can recite lines of liturgy without the Holy Spirit.
We can talk with others about life without the Holy Spirit.
We can prepare sermons without the Holy Spirit.
We can listen to those Spirit-less sermons without the Holy Spirit.
We can offer prayers without the Holy Spirit.
We can partake of a thimble of grape juice and a tiny cracker without the Holy Spirit.
We can run through our optimized order of service without the Holy Spirit.
As to the second point, Dan says:
The church assembly of the Bible was led by the Spirit from beginning to end. It depended in the Spirit for everything. Without the Holy Spirit, the charismatic gifts would cease to function. There would be no prophetic words possible. No words of knowledge or wisdom. No healing. None of the functions of a normal assembly of Christian people filled by the Spirit coming together to share their individual giftings in a public setting.
The order of the church would vanish without the Holy Spirit. What would those assembled do next? No one would have a psalm or spiritual song to bring because the Holy Spirit would not be there to inspire its singing or bringing. What inspired-in-the-moment message would be possible? Who would lead?
The people in the church assembly, those equipped by the Spirit to use their gifts, would have nothing to do, their reliance on the Spirit shattered by His absence. They would sit passively, lost.
A real church without the presence of the Holy Spirit to guide, equip, use, and mobilize would cease completely to be what it is supposed to be as depicted in the Bible.
Interestingly, the Holy Spirit often leads us to do certain activities that can be done without him or apart from him. So, how can we tell the difference between doing certain activities WITHOUT the Holy Spirit and doing them WITH the Holy Spirit?