I have heard of but never read Swedenbourg. Must add him to my list. Schwarzy will be a tough slog, and I haven’t read him either, since he doodled in space parabola, & whatnot, for fun, while on the front line of the Great War, basically the father of what is now called black holes. He did not name them, he calculated their existence in space by the very way they warp the light around them (if I even have this correctly stated).