In this verse, Bhagavan Krishna addresses the core obstacle of the human condition: the veil of ignorance (avidya) that obscures our inherent divinity. Krishna explains that when the light of self-knowledge (jnana) arises, it does not merely suppress ignorance; it annihilates it entirely. This is not a process of learning new information but of removing the cloud of misconceptions—the mistaken identification with the body, mind, and ego—that covers the eternally luminous nature of the Atman. By destroying this illusory shroud, the practitioner reaches a state where their own consciousness acts as a self-revelatory beacon. Just as the sun requires no external light to reveal itself, the Self, once purged of ignorance, naturally illumines the Supreme Truth (tat param). In the context of the Gita, Krishna is guiding Arjuna toward a shift in perspective from the fragmented, anxiety-ridden worldly identity to the stable, infinite reality of Brahman. The 'illumination like the sun' suggests that the realized soul no longer needs to hunt for the Divine in hidden places; rather, the Divine shines forth spontaneously through their very existence, transforming their perception of the entire world into a manifestation of the Supreme.

True spiritual realization is not an acquisition, but the spontaneous revelation of the Divine that occurs once the darkness of egoic ignorance is permanently dissolved.