Here's me, by the way, from a few years ago, before I got the central concept here - about the exact one "swimming upstream" from the Father breaking the egg, providing the only way to the life - the resurrection - that God offers us. I did not grow up Communist at all or Muslim, etc. I don't even have any funny accent, even though my grandad was "PA Dutch":
"Certainty" The third triangular number (Luke) is the nail that "nails down" the visible to the invisible. Luke actually contradicts Matthew. That's very important in understanding what is the message and what isn't - not historical, for example.
"Certainty" was my own translation of a Greek word in the context of the opening sentence (which is the length of a paragraph) based on its common definition and biblical occurrences.