Every atom of man's body expresses his past, present and future. The reason is that, in the first place, every impulse creates its vibrations and takes a particular direction of activity. This influences the heart, whence the blood is circulated through the whole body. In this way the thought is, so to speak, written on man's face. Man's continual agitation in regard to others, his satisfaction or dissatisfaction, his love or hatred, all show in his appearance. Everyone can know it more or less, but the seer can read more correctly. It is difficult to tell definitely the marks of a person's thoughts and feelings that are shown in his appearance; nevertheless, partly by intuition and partly by experience, man reads them. There are some in whom self-control is developed, who are capable of hiding their thoughts and emotions, and yet it is impossible to feel deeply and to hide one's feelings from the eyes of others.

No doubt form and movement speak aloud of one's condition, but the expression of man's face speaks louder still. There come distinct changes at every impulse, at every change of emotion, making distinct marks which are an open book to a seer. The word Kashf means "opening," and it is used by the Sufis with the meaning that the human heart is as a rule a closed book and the one to whom it becomes open can read it like an open book. No doubt reading man's condition of mind from his appearance is not such a difficult thing. Even dogs and cats can know this and sometimes they know better than man.

What gives one insight into another is, in the first place, his sympathy. The seer first develops the quality of love. He whose heart is kindled with the love of God is capable of the love of humanity. The heart thus kindled with love becomes a lighted lantern, which throws its light on every person the seer meets, and, as this light falls upon the person he meets, all things about that person, his body, heart and soul, become clear to him. Love is a torch that illuminates all that comes within its light, but it is the knowledge of God which is the key which opens the hearts of men.