Chapter 4 · Verse 39
Krishna has been describing the many forms of inner yajna (sacrifice) that lead to knowledge. Now he names the conditions under which that knowledge actually arrives: who gets it, and who doesn't.
śraddhāvāl labhate jñānaṃ tat-paraḥ saṃyatendriyaḥ | jñānaṃ labdhvā parāṃ śāntim acireṇādhigacchati ||
1.Plain meaning
The person who has shraddha (faith, sincere engagement) gains knowledge. The one who is dedicated to that and has the senses under control gains it. Having gained knowledge, they swiftly reach the highest peace.
2.Line by line
tat-paraḥ
saṃyatendriyaḥ
jñānaṃ labdhvā parāṃ śāntim
acireṇādhigacchati
3.What is really happening
A.Three conditions, not a checklist
Shraddha, tat-parah, and samyatendriyah are not three separate accomplishments you collect like merit badges. They are three ways of describing the same inner posture: a person who is genuinely oriented toward clarity, has made it the center of their attention, and has not let their attention scatter. They are one thing viewed from three angles.
B.Knowledge as something you receive, not manufacture
The verb is labhate: gains, receives, obtains. Not 'produces' or 'constructs.' This is not saying you think your way to jnana. It is saying you create the conditions in which it can arrive. The knowing happens when the ground is ready. The ego's tendency is to try to force understanding. This verse describes the opposite move: prepare the ground and get out of the way.
C.Peace as the natural consequence, not the goal
Para-shanti is not what you are aiming at. It is what follows when jnana genuinely lands. If you pursue peace directly, you are still in the anxious-wanting mode, which is precisely what the peace resolves. Krishna names peace as an outcome here, not as a target. That ordering matters: seek clarity; peace follows.
D.The quiet diagnosis in 'swiftly'
Saying the peace arrives quickly once knowledge is gained implicitly diagnoses where most people are stuck. Not in the final step, but in the first: they don't have real shraddha, or they haven't made the inquiry central, or their attention is too scattered to receive anything. The slowness is always upstream of the knowledge, never downstream from it.
4.Modern parallel
Person A reads about meditation, neuroscience, philosophy, and self-inquiry for years. They find it all interesting. They sample practices and drop them. They are curious but not committed. The knowledge remains conceptual, a collection of interesting ideas. Peace feels like something to schedule. Person B has the same information. At some point they stop consuming it and start actually sitting with the questions. They reorganize their mornings. They stop treating the inquiry as one item among many. The senses are not constantly pulling them sideways. At some point something settles into place, and the anxiety they carried about not-knowing loosens. Not dramatically. But it does not come back.
→What comes next
Verse 4.40 turns to the opposite profile: the person who has no shraddha, who doubts without engaging. Krishna describes what that state costs. When ready, say: "4.40"