Arjuna has just asked how Krishna, born in historical time, could have taught this wisdom to the ancient sun-god Vivasvan. Krishna answers not with theology but with a stark description of what memory and identity actually look like when they are no longer tied to a single body.
śrī-bhagavān uvāca | bahūni me vyatītāni janmāni tava cārjuna | tāny ahaṃ veda sarvāṇi na tvaṃ vettha parantapa ||
The Blessed Lord said: Many births of mine have passed, and of yours too, Arjuna. I know all of them; you do not know them, O scorcher of foes.
Arjuna's surface question was chronological: how could you have taught Vivasvan when you were born after him? But the deeper question is: who are you, really? Krishna does not answer the chronological puzzle directly. He answers the deeper one. Identity that is not locked to a birth-date does not have a chronological problem.
You remember what you identify with. A dream feels completely real while you are in it; the moment you wake, the identification shifts and the dream goes thin. Krishna's point is not that he has a better memory than Arjuna. It is that he is not inside any one dream. Arjuna is fully inside this one.
Krishna presents a difference, not a permanent hierarchy. The whole Gita is the process of helping Arjuna cross this gap. The teaching is only needed because the gap can be closed. A permanent ontological difference between teacher and student would make teaching pointless.
If identity can persist across bodies without depending on any one body, then the grief Arjuna feels at the prospect of losing these particular bodies is based on a misreading of what is actually at stake. This verse quietly dismantles the premise of his original grief before addressing it directly. The bodies that will fall in battle are not the first bodies these beings have inhabited, and not the last.
Person A is a founder in crisis: the company might fail, the identity built around it might collapse, and that feels like annihilation. Every decision is made from inside that single story. The past before the company barely feels real; the future after it is unimaginable. Person B has watched several companies rise and fall, including their own. They can still feel the weight of this particular moment, but they are not entirely inside it. They know from direct experience that identity survives the collapse of a particular form. They act with more clarity, not because they care less, but because they are not confusing the current form with the whole of who they are.
Krishna uses this epithet at the exact moment he is pointing out Arjuna's limitation: you cannot see your past lives. The name is a quiet counter-pressure. It reminds Arjuna of a capacity he already has: the ability to direct intense, burning focus at what opposes him. The limitation Krishna is naming is not a character flaw. It is just where that focus has not yet been turned.
Verse 4.6 deepens the mystery: if Krishna takes birth repeatedly, by what mechanism does he choose to do so? The answer involves a word that commentators have argued about for centuries. When ready, say: "4.6"