The Fountains
Heron Fountains have three sections - two lower, airtight capsules, and one open section.
The fountain works with the principal of air displacement, which requires “priming the pump:” turning it upside down and back up again.
In the storytelling, prophets are stationed at each section - Isaac at bottom, Moses in the middle, and Jesus on top. Heron is saying ascension necessarily requires that the pump be primed. Moses was bad; King Solomon was also bad. But: in the same way that Jesus opened ascension to the entire religion through his own sacrifice, so did the crimes of Moses and King Solomon prime the pump for the rest of the entire religion.
Ascension is not first-come, first-served. A drop of water might stay in the second chamber for a while, or move up very quickly, but all purely by chance.
Agitation of water by the fountain is also a way to shake out extra electrons, which float up and above the tertiary world, in clouds or vapor. Applying one electron theory into this idea gets it pretty interesting.
Heron Fountain Design