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## Deep-Vision: Knowledge Like a Lamp
**Deeper Vision:** This vision is characterized by a gross, rather than subtle, understanding. Although it is more stable and powerful than the previous three visions, it is still considered gross compared to the stable, luminous vision. This is because the knowledge of a lamp, while stronger and more stable than the fire of grass, wood, or fuel, is still weaker and less luminous than the light of gems, stars, etc. Similarly, this Deep-Vision is stronger and more stable than the knowledge of friends, etc., but weaker and less stable than the stable vision.
Just as objects within the circle of light emanating from a lamp are illuminated, but distant, subtle objects outside the circle remain unseen, so too, in this vision, gross objects are perceived, but subtle, distant, and hidden objects remain unseen. Like the oil that fuels a lamp, this vision is limited by its own capacity. It shines as long as the fuel lasts, but once the fuel is exhausted, it extinguishes. Just as a lamp can be extinguished by a gust of wind or become unstable, this vision can also be extinguished or become unstable due to external influences. In many ways, the limitations of this vision are comparable to those of a lamp.
Here, as per the previously mentioned characteristics of "vision," there is a constant adherence to right faith, which gradually eliminates wrong actions and brings one closer to right actions.
**Pranayama:** Here, the focus is on the spiritual aspect of Pranayama. The external, physical aspect of Pranayama, which involves controlling the breath, is not the primary focus here. This is because such physical practices, being merely a form of bodily purification, can only lead to mental restlessness and hinder the practice of true Pranayama.
There are three types of external Pranayama: (1) Exhaling the breath, known as **Rechaka** Pranayama. (2) Inhaling the breath, known as **Pooraka** Pranayama. (3) Holding the breath still, like water in a vessel, known as **Kumbhaka** Pranayama.
**Note:** The text refers to a source for further information on Pranayama.