The jinn is an entity with a mind; but not a mind like that of man; a mind more pure, more clear, and illuminated by the light of intelligence. The mind of the jinn is deeper in perception and in conception, because it is empty, not filled with thoughts and imaginations as is that of man. It is the mind of the jinn which may be called the "empty cup"; a cup into which knowledge can be poured, in which there is accommodation. It is for this reason that the Teachers on the spiritual path appreciate the quality of the jinn in the minds of their pupils, in which they find accommodation for knowledge. A cup which is already filled, or even partly filled, does not give free accommodation for that knowledge which the Teacher wishes to pour into the heart of his pupil. As the jinns are keen in perception and conception, so they are keen in expression either in word or deed. The action of the jinn extends as far as the mind can reach; and the word of the jinn reaches even farther than the voice, for its root is in the mental sphere which is above the air-waves.