Although physiological benefits are easily distinguishable by those who arduously practice Pranayama, the spiritual values of Pranayama are no less significant. In fact spiritual values of Pranayama are equally great. However, people find it not easy to comprehend how physical exercise of Pranayamic exercise lead to spiritual exuberance of a person. Lack of scientific evidences can be a main reason for this disapproval amongst common people. However there are quite many Yogic experts who have made valid remarks to justify the spiritual values of Pranayama. Some of the medical students who have specialized in `endocrinology` inferred an interesting analysis. They have claimed that concluded that the endocrine glands are capable of influencing not only the physiology but also the psychology of an individual. It is the pranayama, which keep the endocrine glands in better functional stage, contributes to the spiritual growth. This constitutes to the spiritual values of Pranayama. Even some of the endocrinologists go to the extent of saying that even criminals can be transformed into most pious persons with the appropriate Pranayamic exercises of endocrine glands . However, hardly any scientific evidences can be put forward in their support, it is unanimously accepted by everyone that the endocrine glands materially influence the psychology of a person. So by influencing the functioning of endocrine glands the pranayama definitely brings about some kind of impact on the psyche of any individual. Based on assumptions of those particular nerves of the nervous system influence psychology of human being, just like the internal endocrinal glands affect it. These nerves of the human nervous system could be successfully worked upon and made to receive amazing impulses and vibrations is a reality of every day experience for all the Pranayamic yogic students.

It is worth to note that the `alveolar surface of the lungs` comprises of the wide areas from which `interoceptive` nerve impulses go to the brain. Particularly it happens when the lungs are stretched to their utmost extent. This function is not limited to the lungs alone, and also extends to the bronchioles, bronchi, trachea and the larynx. Thus one could look forward to a chance of a possible integration of the `autonomic` and also cerebral and spinal impulses thereby bringing about a balanced state of the mind and which enhances consciousness to elevated situation. Pranayama can bring about changes in these internal functions of human body, thus affecting the human pysche. In `Yoga-Mimarnsa` , a special book dealing with Pranayama , it has been mentioned that certain changes of the `intrathoracic` and `intra-pulmonic` pressure changes can be brought about due to Pranayama. Certain internal pressures of the abdomen also change considerably due to the exercise of Pranayama yoga. . It can also be easily proved that all the three types of pressures, as cited just now, are highly delivered during Pranayama practices. This high pressure gives marginal stimulus to the diverse network of intersecting nerves that are to be found in the abdomen and the thorax.

Also certain more assumptions are being made by eminent yogists about the spiritual values of Pranayaama. They have claimed that the practice of Pranayama induces high pressures both in the central tube of the spinal cord and the `ventricles` of the brain. These pressures stimulate the whole of the central nervous system. Due to these Owing to these central and marginal stimuli, the consciousness of the human being begins to be interiorized and super sensuous perceptions thus begin to generate. The Spiritual values of Pranayama reaches to a new dimension, according to many yogists, when they said that the consciousness itself gets more and more refined, until the consciousness of the human being blends into the cosmic enabling a person to coalesce with the Infinite.