The soul has two main faculties.

Spirit cannot be perceived by the material senses of the physical body, excepting as it is expressed in outward signs and works. The human body is visible, the soul is invisible.

It is the soul nevertheless that directs a man’s faculties, that governs his humanity.
The soul has two main faculties.
(a) As outer circumstances are communicated to the soul by the eyes, ears, and brain of a man, so does the soul communicate its desires and purposes through the brain to the hands and tongue of the physical body, thereby expressing itself. The spirit in the soul is the very essence of life.
(b) The second faculty of the soul expresses itself in the world of vision, where the soul inhabited by the spirit has its being, and functions without the help of the material bodily senses.
There, in the realm of vision, the soul sees without the help of the physical eye, hears without the aid of the physical ear, and travels without dependence upon physical motion. It is, therefore, clear that the spirit in the soul of man can function through the physical body by using the organs of the ordinary senses, and that it is able also to live and act without their aid in the world of vision. This proves without a doubt the superiority of the soul of man over his body, the superiority of spirit over matter.

`Abdu'l-Bahá: Paris Talks