The human form may be called materialized light, the symbol of which in mysticism is the five-pointed star, suggesting the head, arms, and feet, which make five points. The nature of light is to spread its rays, and as the human form is made of light (Nur) the hands and the feet, the fingers and the toes, the organs of the senses and the hair all represent rays. It is the knowledge of this light that one sees in the Eastern customs of blessing with the tips of the fingers on the head, and of kissing the hand or touching the feet, for the fingers and toes are the source of the radiance.