Link to purport by A C Bhaktivedanta Swami Srila Prabhupada

Transcript of Bhakti-Shastri class on this verse by Chaitanya Charan

Bg 13.18

jyotiṣām api taj jyotis
tamasaḥ param ucyate
jñānaṁ jñeyaṁ jñāna-gamyaṁ
hṛdi sarvasya viṣṭhitam

Synonyms: 

jyotiṣām — in all luminous objects; api — also; tat — that; jyotiḥ — the source of light; tamasaḥ — the darkness; param — beyond; ucyate — is said; jñānam — knowledge; jñeyam — to be known; jñāna–gamyam — to be approached by knowledge; hṛdi — in the heart; sarvasya — of everyone; viṣṭhitam — situated.

Translation: 

He is the source of light in all luminous objects. He is beyond the darkness of matter and is unmanifested. He is knowledge, He is the object of knowledge, and He is the goal of knowledge. He is situated in everyone’s heart.

jyotiṣām api taj jyotis, among all luminous object I am light

tamasaḥ param ucyate, I am beyond all darkness 

jñānaṁ jñeyaṁ jñāna-gamyaṁ, 

hṛdi sarvasya viṣṭhitam

I am situated in the heart of all living beings. Clearly referring to Super Soul. 

jñānaṁ jñeyaṁ jñāna-gamyaṁ, there is knowledge, there is object of knowledge and there is goal of knowledge 

What is the difference between object of knowledge and goal of knowledge, it is subtle but significant difference, e.g. when Doctor is examining the patient the object of knowledge is the body or about the deceases but the goal is to cure. 

Jñeya for us is atma, the parmatama and the relationship between the two

As this knowledge brings liberation.

jñāna-gamyaṁ is to love Krishna and serve Krishna.

End of transcription.