The main spiritual problem is that people never change

In the real world, the main spiritual problem is that people never change. They identify with beliefs, their job, and the life path that impressed them. Their ego never changes, because it doesn't want to. Once they've reached that point in life, they cease to learn, stack skills, and "level up" to the point of more opportunities being available to them. By improving your skill set, you are able to take on more complex challenges in life. By taking on more challenges, you acquire the knowledge and experience that expands your awareness.