He did not know that the Old One was his father, for such a relationship was utterly beyond his understanding, but as he looked at the emaciated body he felt a dim disquiet that was the ancestor of sadness.
That sure as fuck ain't no cow
Maybe, it is easier to forget the past,than to overcome the pain caused by it.Maybe, it is one of some other reasons,why men forget their prehuman ancestor.
If we presume that the boundary of the universe is a kind of surrounding wall,then we think like ancestors who thought there's abyss at the edge of flat earth.
We should have known much more than our ancestors.But if we learn less, we're much more stupid than them.