Does not a world that seems quite real arise in dreams? Yet think what this world is. It is clearly not the world you saw before you slept. Rather, it is a distortion of the world, planned solely around what you would have preferred. Here, you are "free" to make over whatever seemed to attack you and change it into a tribute to your ego, which was outraged by the "attack." This would not be your wish unless you saw yourself as one with the ego, which always looks upon itself and therefore on you as under attack and highly vulnerable to it.
Dreams are chaotic because they are governed by your conflicting wishes, and therefore they have no concern with what is true. They are the best example you could have of how perception can be utilized to substitute illusions for truth. You do not take them seriously on awaking because the fact that reality is so outrageously violated in them becomes apparent. Yet they are a way of looking at the world and changing it to suit the ego better. They provide striking examples both of the ego’s inability to tolerate reality and your willingness to change reality on its behalf.
Before the idea of attack can enter your mind, you must have perceived yourself as weak. Because you had attacked yourself and believed that the attack was effective, you behold yourself as weakened