Now we have been given two main faculties of perception: 1) the sense of touch, smell and taste - the lower senses, 2) Samee, the hearing faculty, and Basir, the seeing faculty which are the higher or principle senses. These two groups work with the physical body, with the ears and eyes. One sees, the other hears, but they work in the mind. It is the mind which listens and sees. The mind is listening when it is aware of things without people telling us. We perceive that a person is displeased. A person may say "Thank you", and yet the mind perceives that he does not really thank you, but is using the words out of formality or even out of sarcasm. So it is the mind which discriminates; the ears of the mind listen. The more developed the mind, the more it can listen even without the help of the ears; it listens to another person's thought without utterance of sound. The mind can see the form of the thoughts and discriminate between them; it is a seer. However, it is easier for the mind to perceive by hearing than by seeing.