ORIGINS AND RESOURCES
Focusing is a psychotherapeutic process developed by the late Eugene Gendlin, a psychotherapist, whose research was centered around the observation that lasting positive change during psychotherapy sessions, was correlated with the client's natural ability to tap into their non-verbal body based feel of the issue they were working on. He called that body feel "the felt sense". He found that clients who looked within themselves for images or senses...fumbled for words and checked what they were saying with themselves had a greater success rate in therapy. Essentially, the better your ability to connect with yourself and your own truth, the better the chances of progress and moving forward.
If you would like to learn more, I would suggest reading the following to start:
Focusing by Eugene Gendlin
The Power of Focusing: A Practical Guide to Emotional Self-Healing by Ann Weiser Cornell
The Radical Acceptance of Everything: Living a Focusing Life, by Ann Weiser Cornell and Barbara McGavin