Joel Goldsmith isn’t actually a Sufi, but his ideas and teachings do seem to be in alignment with the Sufi way. Here is what he has to say about the soul:

The soul is a part of man which is little known and only seldom realized.

Often those in the depths of some deep sorrow break through the mist of material sense to the recesses of their innermost being, where they discover the Soul, or Reality, of being. They become Soul-conscious, and find new values, new resources, new and different strength, and an existence of an entirely different nature.

The exercise of the Soul-faculties results in breaking the illusions of sense. All human discords are products of material sense and are experienced through the five physical senses – that is, all mortal inharmonies are seen, heard, felt, tasted, or smelled. Existing only in this material state of consciousness, discords and disease have their being merely as false sense, or illusion, though naturally seeming very real to the senses.

There are many means of securing temporary relief from erroneous conditions of health, wealth, and other inharmonies of daily existence. Complete and final destruction of error comes only through the achievement and exercise of the faculties of the Soul.

The Soul is that part of man which lies buried deepest within him and is therefore seldom realized. We use our mathematical faculties and our musical faculties because these lie nearest the surface of our being, and much more than these, even, our ordinary business faculties and our sense of direction, or even our artistic sense, but artists and authors and skilled musicians go deeper within their being and bring forth the great harmonies of fine music, good literature, paintings, sculpture, and architecture.

Hidden even deeper than these, yet within the reach of our own consciousness, lies the Soul and Its faculties. These Soul-powers, when touched by us, come forth from within us and reach every avenue of our daily life, giving inspiration, beauty, peace, joy, and harmony to each moment of our existence and clothing every event in our experience with love, understanding, and success.

Those too busy with the pains and the pleasures of sense will not, of course, reach the realm of Soul. Throughout the ages the invitation has been extended to mankind to drink of this fountain of living waters, and every generation has produced many men and women who have found eternal youth and peace within themselves.

Every so often one arises who has drunk more deeply at the fount of Soul, and these seers have told of the kingdom within and of the life that may be lived through Grace when this consciousness is achieved.

On the other hand many answer that they have great human duties which occupy all their time; others require so much time for sense pleasures, pastimes, and recreation; still others are immersed in a accomplishing and acquiring.

More and more, people are beginning to realize that freedom from fear, insecurity, want, and ill health is not to be found in the material realm. Wars will not end wars; investments will not ensure security from want. Medicines alleviate pain, but do not produce real health.

Some greater power than can be found in the human body or thought must be tapped to give us the happiness and harmony and peace that are our birthright. This power is available to everyone because it is already a part of our being – in fact, it is the greatest part of our being. As the iceberg reveals only a portion of itself to sight above water, so our human powers of body and mind represent not more than one-third of our powers and faculties.

The powers of the Soul are more real and tangible than any of the material powers of nature or invention. They operate on a higher level of consciousness, but are made evident in so-called human affairs.

Soul-forces act upon the human body to produce and maintain health and harmony. They touch every avenue of daily existence as protective influences and are the source of infinite supply.

The Soul-conscious people of this world live an inner life of peace, joy, and dominion and an outer life in complete harmony with themselves and with all the world of men, animals, and things. They are in tune with their Soul-powers, and this constitutes their at-one-ment with all creation.

Everyone may have access to the Soul. It lies deep within the recesses of our own being. Desire for the higher attainments of life is the first requisite, and then must follow a continuous turning within until the goal has been attained.

~The Infinite Way