जडप्रकाशकः सूर्यः प्रकाशात्मैव नो जडः ।बुद्ध्यादिभासकस्तस्माच्चित्स्वरूपस्तथा मतः ॥ ६१८ ॥
In plain words
The sun illuminates the inert, yet it is itself of a luminous nature, never inert. Because it reveals the intellect and all else, the Self is recognized to be pure consciousness itself.
Close to the Sanskrit
The sun is the illuminator of the inert, of luminous nature itself, not inert. The illuminator of the intellect and others, therefore, is considered thus of the nature of consciousness.