Prince Rupert of Bavaria discovered an interesting phenomenon that makes glass harder than steel. This YouTube video from Smarter Every Day demonstrates its properties.
Did you notice how the exceedingly strong lump of glass could only be broken by snapping the weaker, tail-section? That suggests an equally mysterious phenomenon within God’s church; as strong as the church is against outside attack, internal stresses can explode it.
When glass is held in a flame until it’s hot enough, it begins to flow like an extremely thick liquid, with its high-viscosity holding it in a single mass. Similarly, when God’s church is spiritually hot enough, it too begins to move, and like a liquid, it fills voids in people’s lives. When the church cools, however, it becomes brittle enough to break easily under stress.
I found the almost-instant, explosive force flowing from a break in the relatively weak tail particularly fascinating. God’s Spirit holds his church together and strong through the people’s individual characteristics and interpersonal dynamics, but the tiniest break can release those dynamics explosively and travel through the church at lightening speed.
The enemy will most certainly use the church’s internal stresses to fracture it, but that can’t happen as long as it’s kept hot by the Holy Spirit’s fire.