But prepare the child for the road. Two constants - Everyone is building a house and every house will face a storm. It is easier to build on sand. Just throw up the building without much preparation. A foundation of rock may require some chiseling, or moving the heavy rocks around.
Sand is shaped much more easily.
The foundation involves the base of our lives. It is a philosophy of life or a guiding principle. Different people build on different things. For many Americans the foundation seems to be career. We begin to prepare for it in college - we move toward that goal.