There are five elements that constitute man's being: earth, water, fire, air, and ether. Air represents the voice, and it reaches the ether, which means that the voice reaches farther than anything else in the world. It touches the depths of man's heart. Therefore music is a living miracle. There is nothing that can thrill man's being through and through as sound can. This explains why suggestion is much greater and more beneficial in healing than any other remedy.

In India, where the daily life of the people is based upon psychical laws, they take great care in speaking to another person that it may not produce a bad-effect upon his physical, mental, or spiritual self.

A healer, who by the power of Zikr develops the healing power of his voice, impresses his word with the power of his heart on the heart of the patient.

The healer must be sincere in his suggestions, because all the power lies in his sincerity;
he must also be self-confident;
he must have psychic power developed in him;
but beyond and above all he must be a good man, so that at the time no thought of humiliation or of any sort of uneasiness should come to him.
His thoughts, feelings, and actions should be satisfactory to his conscience; if not, any discomfort, dissatisfaction, fear, or repentance weakens his power. Then he is no longer capable of healing, however learned and powerful he may be.

When the healer thinks he is healing, his power is as small as a drop; when he thinks God is healing, and when owing to this thought his own self is forgotten and he is only conscious of the self of God, then his power becomes as large as the ocean.