I have a metaphor for hypnosis, and that is using the rooms in your house.
Let us say there are 5 rooms in your house. It is at night and the whole house is dark because the lights are not switched on.
You now have a thought, and that thought belongs to say, room A. It is now light up.
Similarly, during hypnosis, your mind is closed to many other things (just like the lights of the rooms are off). The hypnotherapist suggests something and now the room that represents this thought is turned on. You can see it clearly. All other thoughts still exist. It is just that it is dark and you don’t see them. They have taken a backseat.