Image by: Natascha Roeoesli
Many people with PTSD and substance abuse struggle with either feeling too much (overwhelming emotions and memories) or too little (numbing and dissociation). In grounding you attain balance between the two - conscious of reality and able to tolerate it.
Pain is a feeling, it is not who you are - When you get caught up in it, you feel like you are your pain and that is all that exists. But it is only one part of your experience - the others are just hidden and can be found again through grounding.