। ॥ ६१९ ॥
In plain words
An insentient wall or object can never shine by itself without sunlight, as we directly see. Similarly, the intellect cannot possess even a tiny spark of awareness without the Self. That Self is pure consciousness declared by the scriptures, just as the sun is made entirely of light.
Close to the Sanskrit
An appearance of the inert wall and the like is never possible by itself at any time without the light of the sun and others, this is directly seen thus. Even of the intellect there is not even an atom of pulsation by itself without the Self. This is that pure consciousness declared by the Veda, just as the sun is made of light.