Chapter 1 frames earthly life as a formative passage rather than an endpoint. Its controlling image is prenatal development: just as health in the womb prepares a child for life on earth, life on earth prepares a person for birth into the spirit world.
The chapter also connects that preparation to the original design of creation. God is presented as the spiritual focal point and Adam as the physical focal point, so human life reaches its purpose where vertical and horizontal realities meet rightly.
The moral pressure of the chapter comes from time. Preparation does not happen only in grand seasons. It is carried in ordinary moments, because a single thought, word, or act can become a crossroads with lifelong consequence.