Contextualize: This passage is about the beginnings of Humanism and the forest as a subject or element that caused the appearance of what we know as civilization. The scene takes place in the West, in a landscape abundant with forests in all directions, in which the people who inhabited it were lonely, without parents, or responsibilities, nothing. They lived a life without rules or restrictions, what the author describes as "bestial freedom." They visualized the space in a horizontal sense, because the density of the forests did not let them see more. The forest respresented the unknown.
As everything in nature is part of a cycle, forests dry up and between darkness, light passes through and creating the idea that there is something else than the forest, that's when the giants become aware of the sky and visualize the space vertically. Thus was born the first act of human enlightenment: forest clearing and the appropiation of it for the creation of the three human institutions: religion, matrimony and buried of the dead. The forest becomes the obstacle and threat to the progress of the human being.