Patanjali Yoga Sutra : 2: 20

The seer behind the seeing

Drashtaha Drushimatrah Shuddhopi Pratyayaanupashya

The one who sees, hears, tastes, smells and experiences the sense of touch is the seer and not the body. That seer is pure and does not go through any modifications. It has only the power to see. But the seeing happens not alone, but through the mind and the intellect. The seer is the Purusha who is like the light in a bulb. The lesser the dust and dirt on the bulb, the better the light shines. The dust and dirt are our thoughts that modify the passage of consciousness by its mere presence. - Swahilya Shambhavi.

Patanjali Yoga Sutra 2:19

From gross to subtle

Vishesha avishesha linga matra lingam Gunaparvani

The gross world of names and forms have these four qualities - some objects can be defined as they can be perceived by the five sense organs - something like a mountain for instance.
Some cannot be defined like empty space and the particles of light emitted by people - called the aura. Some can be identified by symbolocial understanding like the world can be understood by a map.
But some have no symbols. whatsoever as these are the manifestations of different qualities.
-Swahilya Shambhavi.