Then there’s the Third Kind of box called “never,ever to be opened.”
Those boxes hold the experience you had in your life that your unconscious mind felt were so overwhelming for you, it took all the emotion away, get it, and locked it into your subcon to protect you until you were strong enough, or wise enough, or ready in whatever way, for that box to open.
Those boxes are full of emotion, trauma, and things from different. In your life where you didn’t have the tools and ability to deal with feelings of hurt and anger. The emotions were drawn into your subconscious, unconscious mind, and stayed there, controlling everything about you and your present life. That is where phobias fears and anxieties originated.
When you remember an event and comprehend how it affected you, it might be quite traumatic, but the subconscious setting that memory as a path to Healing. If one of those do not ever open boxes pops you might very well experience a moment or more of crisis. Here’s the thing- you will come through the other side.

It might seem strange to think that it’s all right to experience trauma by looking at pain and damage from the past but that’s part of the journey. The subconscious is always there to protect you, but you have to consciously tap into that for the healing. Repression protects but it doesn’t mend reconcile and rebuild.

You have to know how to manage your fear response to keep your mind and body calm enough to prvent your brain from shifting out of “learning” into “protective” mode.